[#2635] Fixed more clean up comments

[#2635] Addressed cleanup comments and fixed UT

Changes to be committed:
    mt_tcp_listener_mgr.h
    tcp_connection.h
    tcp_messages.mes
    tests/Makefile.am
    tests/mt_tcp_listener_mgr_unittests.cc
    tests/tcp_test_listener.h

[#2635] Added MtTcpListenerMgr to libtcp

Added new files:
    src/lib/tcp/mt_tcp_listener_mgr.cc
    src/lib/tcp/mt_tcp_listener_mgr.h
    src/lib/tcp/tests/mt_tcp_listener_mgr_unittests.cc
    src/lib/tcp/tests/tcp_test_listener.h

src/lib/tcp/tcp_messages.cc b/src/lib/tcp/tcp_messages.cc
    Added new messages:
    MT_TCP_LISTENER_STARTED MT_TCP
    MT_TCP_LISTENER_STOPPED MT_TCP
    MT_TCP_LISTENER_STOPPING

src/lib/tcp/tests/tcp_listener_unittests.cc
    Moved classes to tcp_test_listener.h

src/lib/tcp/tests/tcp_test_client.h
    TcpTestClient
        made responseReceived virtual.
        added ability to set a response_handler

[#2630] IPv4 -> IPv6

[#2630] Removed link-addr from relay

[#2583] Uncommented BLQ definitions

[#2583] Added TcpConnction::responesSent()

src/lib/tcp/tcp_connection.*
    TcpConnection::responseSent() - new virtual method
    TcpConnection::doWrite() - calls responseSent() and
    conditionally starts idle timer

src/lib/tcp/tcp_stream_msg.h
    TcpStreamResponse::getResponseString() - added

src/lib/tcp/tests/tcp_listener_unittests.cc
    Added AuditTrail to faciliate verifying outcomes

[#2583] Added missing include to test client

[#2583] Missed some changes

[#2583] Added ChangeLog entry

[#2583] Connection filter now accepts endpoint

src/lib/tcp/tcp_connection.*
    Added TcpConnection::getRemoteEndpoint()
    Changed connection filter to accept remote endpoint

src/lib/tcp/tests/tcp_listener_unittests.cc
    Updated connection filter

[#2583] Renamed tcp_stream

Moved tcp_stream* to tcp_stream_msg*
Replaces strings with vectors in TcpStream classes

[#2583] Make connection filter optional

[#2583] Added connection filter callback

src/lib/tcp/tcp_connection.*
    TcpConnection added connection_filter callback invoked in acceptorCallback()
    prior to initiating handshake.

src/lib/tcp/tcp_listener.*
    Added connection filter callback to ctor, which is passed into createConnection()
    and used duing connection acceptance to potentially reject connections

src/lib/tcp/tests/tcp_listener_unittests.cc
    Added filter test

src/lib/tcp/tests/tcp_messages.*
    Added new log message

[#2583] Fixed ca test dir in tests/Makefile.am

[#2583] Addressed minor review comments

    Fixed the small stuff.

[#2583] Removed comment

[#2583] Cleaned up tcp_stream and UT

src/lib/tcp/tcp_connection.cc
    Removed couts

src/lib/tcp/tcp_stream.h
    Added doxygen

src/lib/tcp/tests/tcp_listener_unittests.cc
    Removed HTTPs
    Added testing of mulitple messages per client

src/lib/tcp/tests/tcp_test_client.h
    Clients now use TcpStreamRequest to receive and can
    send/receive multiple requests/responses

[#2583] Fixed dox file name

Changes to be committed:
modified:   ../../src/lib/tcp/Makefile.am

[#2583] Added multiple clients test

Changes to be committed:
    modified:   tcp_listener_unittests.cc
    modified:   tcp_test_client.h

[#2583] Cleaned up log messages

[#2583] Removed request timeout

src/lib/tcp/tcp_connection.*
src/lib/tcp/tcp_listener.*
src/lib/tcp/tests/tcp_listener_unittests.cc
    Removed request timeout and test

[#2583] Clean up

src/lib/tcp/tcp_connection.cc
    MAX_LOGGED_MESSAGE_SIZE -> const

src/lib/tcp/tcp_connection.h
    Whitespace cleanup

src/lib/tcp/tcp_connection_acceptor.h
    Fixed protector name

Removed variants of HTTP and persist.

[#2583] Create TcpMessage base class

src/lib/tcp/Makefile.am
    Uncommented .dox file
    Set version to 1.0.0
    Updated list of includes to install

src/lib/tcp/libkea_tcp.dox
    Added MT section

src/lib/tcp/tcp_connection.*
    Created base class TcpMessage with WireData member/funcs
    Accessing empty wire data data() now throws

src/lib/util/strutil.*
    Added dumpAsHex()

[#2583] Improved timeout handling and UT

src/lib/tcp/tcp_connection.cc
    Removed recordParamters() func and invocations
    Revamped timeout setups to be request side only
    - idle time measure time between complete requests
    - request time measures time between request reads

    TcpConnection::requestTimeoutCallback()
    - Removed transaction/spawning logic and response generation/send

src/lib/tcp/tcp_messages.cc
    added TCP_CLIENT_REQUEST_TIMEOUT_OCCURRED

src/lib/tcp/tests/tcp_listener_unittests.cc
    Created simple listen test and new split reads test
    Reworked idle timeout test
    Implemented (but disabled) request timeout test

src/lib/tcp/tests/tcp_test_client.h
    Added separate func for connect
    ability to send truncated message, wait for EOF

[#2583] Simple stream request/response functions

src/lib/tcp/Makefile.am
    added tcp_stream.h and tcp_stream.cc

src/lib/tcp/tcp_connection.*
    made TcpRequest,TcpResponse, and TcpConnection abstract

src/lib/tcp/tcp_stream.h
src/lib/tcp/tcp_stream.cc
    new files that implement TcpStreamRequest and TcpStreamResponse

src/lib/tcp/tests/tcp_listener_unittests.cc
    Made initial listener test functional using TcpStream classes

[#2583] Added dox file to libkea_tcp

Changes to be committed:
modified:   doc/devel/Doxyfile
modified:   doc/sphinx/mes-files.txt
modified:   doc/sphinx/mes_files.mk
new file:   src/lib/tcp/libkea_tcp.dox

[#2583] Incremental changes to lib/tcp

Interrim commit, still does nothing.
Unit test fleshed out but disabled.

[#2583] Incremental changes to lib/tcp

Interrim commit, still does nothing.

Added unit test files:
    src/lib/tcp/tests/tcp_listener_unittests.cc
    src/lib/tcp/tests/tcp_test_client.h

[#2583] Initial addition of src/lib/tcp

Added first draft of TcpListener classes.
They compile but don't do anything useful.

configure.ac
src/lib/Makefile.am
    added tcp

src/lib/tcp/README
src/lib/tcp/tcp_connection.cc
src/lib/tcp/tcp_connection.h
src/lib/tcp/tcp_connection_acceptor.h
src/lib/tcp/tcp_connection_pool.cc
src/lib/tcp/tcp_connection_pool.h
src/lib/tcp/tcp_listener.cc
src/lib/tcp/tcp_listener.h
src/lib/tcp/tcp_log.cc
src/lib/tcp/tcp_log.h
src/lib/tcp/tcp_messages.cc
src/lib/tcp/tcp_messages.h
src/lib/tcp/tcp_messages.mes
src/lib/tcp/tests/.gitignore
src/lib/tcp/tests/Makefile.am
src/lib/tcp/tests/run_unittests.cc
    - new files

[#2625] Changed sprintf to snprintf

[#2548] reordered unittests

[#2620] bump up version to 2.3.3

[#2610] typo fix

[#2610] release changes

[#2548] added tests with infinite leases

[#2548] addressed comments

[#2548] addressed comments

[#2548] reverted moving tests

[#2548] addressed review comments

[#2548] set valid_lft_ and preferred_lft_ to 0 instead of setting cltt_

[#2548] updated documentation

[#2548] expire lease on release if affinity is enabled

[#2607] bump lib versions for 2.3.2

[#2311] fix warning regarding capture of ‘this’

Warning happens when NETCONF is disabled on some compilers.

warning: explicit by-copy capture of ‘this’ redundant with by-copy capture default [enabled by default]

OR

warning: explicit capture of 'this' with a capture default of '=' is a C++20 extension

[#248] addressed comments

[#248] addressed comments

[#248] regenerated parsers

[#248] template classes can add regular classes

[#248] using same add/get class interface

[#248] added template classes

[#2604] Fixed whitespace in several files

[#2604] Addresses review comments

src/lib/dhcpsrv/mysql_lease_mgr.*
src/lib/dhcpsrv/pgsql_lease_mgr.*
    addressed doxygen issues

[#2604] Corrected compiler warnings

src/lib/dhcpsrv/mysql_lease_mgr.cc
src/lib/dhcpsrv/pgsql_lease_mgr.cc
src/lib/dhcpsrv/tests/lease_mgr_unittest.cc
    Commented out unused parameters

src/lib/dhcpsrv/mysql_lease_mgr.h
src/lib/dhcpsrv/pgsql_lease_mgr.h
    added missing setExtendedInfoTablesEnabled() variant

[#2400] add ChangeLog entry

[#2400] update NETCONF documentation

[#2400] improve NETCONF performance

... by retrieving data nodes only once from the sysrepo datastore and
iterating through them to get the leaves and leaf-list nodes that are
required, as opposed to retrieving each and every leaf and leaf-list
node from the datastore.

This empirically reduced the time required to push a configuration of
60k leaves and leaf-list nodes from approximately 9m30s to 3s.

[#2311] order methods alphabetically in the YANG translator

[#2311] add ChangeLog entry

[#2311] update hashes of YANG modules

[#2311] ax_find_library: add -L if pkg-config doesn't

Solves a problem in RHEL where -L${libdir} is missing from
"pkg-config --libs".

[#2311] fix ERROR: unbound variable in xml_reporting_test_lib.sh

/tmp/workspace/kea-manual/ut-extended/src/lib/testutils/xml_reporting_test_lib.sh: line 142: ERROR: unbound variable

[#2311] autoconf: include <utility> when checking for boost headers

Solves this error:

In file included from /usr/include/boost/asio.hpp:23,
                 from conftest.cpp:75:
/usr/include/boost/asio/awaitable.hpp: In constructor 'boost::asio::awaitable<T, Executor>::awaitable(boost::asio::awaitable<T, Executor>&&)':
/usr/include/boost/asio/awaitable.hpp:68:19: error: 'exchange' is not a member of 'std'; did you mean 'std::__atomic_impl::exchange'?
   68 |     : frame_(std::exchange(other.frame_, nullptr))
      |                   ^~~~~~~~
In file included from /usr/include/c++/12/bits/shared_ptr_atomic.h:33,
                 from /usr/include/c++/12/memory:78,
                 from /usr/include/boost/asio/associated_allocator.hpp:19,
                 from /usr/include/boost/asio.hpp:20:
/usr/include/c++/12/bits/atomic_base.h:976:7: note: 'std::__atomic_impl::exchange' declared here
  976 |       exchange(_Tp* __ptr, _Val<_Tp> __desired, memory_order __m) noexcept
      |       ^~~~~~~~

[#2311] rename AX_SYSREPO to AX_NETCONF

[#2311] hammer.py now installs libyang2 and sysrepo2

[#2311] update NETCONF documentation

[#2311] retouch the NETCONF developer guide

[#2311] migrate src/bin/netconf to libyang2 and sysrepo2

[#2311] migrate src/lib/yang to libyang2 and sysrepo2

[#2311] fix deprecated capture of 'this' in C++20

In file included from readwrite_mutex_unittest.cc:9:
../../../../src/lib/util/readwrite_mutex.h: In lambda function:
../../../../src/lib/util/readwrite_mutex.h:57:25: warning: implicit capture of ‘this’ via ‘[=]’ is deprecated in C++20 [-Wdeprecated]
   57 |         gate1_.wait(lk, [=]() { return (!writeEntered()); });
      |                         ^
../../../../src/lib/util/readwrite_mutex.h:57:25: note: add explicit ‘this’ or ‘*this’ capture
../../../../src/lib/util/readwrite_mutex.h: In lambda function:
../../../../src/lib/util/readwrite_mutex.h:60:25: warning: implicit capture of ‘this’ via ‘[=]’ is deprecated in C++20 [-Wdeprecated]
   60 |         gate2_.wait(lk, [=]() { return (readers() == 0); });
      |                         ^
../../../../src/lib/util/readwrite_mutex.h:60:25: note: add explicit ‘this’ or ‘*this’ capture
../../../../src/lib/util/readwrite_mutex.h: In lambda function:
../../../../src/lib/util/readwrite_mutex.h:77:25: warning: implicit capture of ‘this’ via ‘[=]’ is deprecated in C++20 [-Wdeprecated]
   77 |         gate1_.wait(lk, [=]() { return (state_ < MAX_READERS); });
      |                         ^
../../../../src/lib/util/readwrite_mutex.h:77:25: note: add explicit ‘this’ or ‘*this’ capture

[#2311] fix variable shadowing

adaptor_config.cc:314:29: warning: declaration of ‘pools’ shadows a previous local [-Wshadow]
  314 |             ConstElementPtr pools = subnet->get("pd-pools");
      |                             ^~~~~
adaptor_config.cc:303:25: note: shadowed declaration is here
  303 |         ConstElementPtr pools = subnet->get("pools");
      |                         ^~~~~
translator_host.cc: In member function ‘isc::data::ElementPtr isc::yang::TranslatorHost::getHostKea(const std::string&)’:
translator_host.cc:89:25: warning: declaration of ‘hostname’ shadows a previous local [-Wshadow]
   89 |         ConstElementPtr hostname = getItem(xpath + "/server-hostname");
      |                         ^~~~~~~~
translator_host.cc:57:21: note: shadowed declaration is here
   57 |     ConstElementPtr hostname = getItem(xpath + "/hostname");
      |                     ^~~~~~~~
translator_host.cc: In member function ‘void isc::yang::TranslatorHost::setHostKea(const std::string&, isc::data::ConstElementPtr)’:
translator_host.cc:165:25: warning: declaration of ‘hostname’ shadows a previous local [-Wshadow]
  165 |         ConstElementPtr hostname = elem->get("server-hostname");
      |                         ^~~~~~~~
translator_host.cc:124:21: note: shadowed declaration is here
  124 |     ConstElementPtr hostname = elem->get("hostname");

[#2311] fix errors caused by the C++20 'requires' keyword

[#2311] detect C++20 in autoconf

And enforce -std=c++20 when building
--with-libyang-cpp or --with-sysrepo-cpp.

[#2311] migrate autoconf to libyang2 and sysrepo2

[#2311] ax_find_library: search for .pc file in lib64 as well

[#2595] Addressed comments

[#2595] Post rebase updates

[#2595] Updated all-keys.json files

[#2595] Finished

[#2595] Checkpoint: to do v6 pedantic and doc

[#2595] Checkpoint: v6 tests and doc

[2595] regen flex/bison

[#2595] Checkpoint: updated parsers

[#2585] Wrote createFromString tool

[#2585] Addressed not v6 specific UT names

[#2585] Addressed naming comment

[#2585] Checkpoint: almost done

[#2585] Checkpoint: finish unit tests

[#2585] Checkpoint: tests to add

[#2357] Updated doc

[#2357] Filled dhcp-agent-options-space

[#2566] Improved wording

[#2566] Reworded the note in doc about backend not supporting host collections

[#2566] Added a note in doc about backend not supporting host collections

[#2566] Added a ChangeLog entry

[#2220] Fix syntax and add a note

[#2220] Re-order changelog

[#2220] Fix up sphinx errors

[#2220] Add upgrade caveat section to install

[#2220] Add more distro instructions to quickstart