[#3307] release changes

[#3304] bump up library versions for 2.5.7 release

[#3300] revert fix and move poll

[#3079] rebuilt requirements.txt for Sphinx

[#3079] ChangeLog corrected

[#3079] ChangeLog updated

[#3079] Bump jinja2 from 3.1.2 to 3.1.3 in /doc/sphinx/src

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.2 to 3.1.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/jinja/compare/3.1.2...3.1.3)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

[#3210] fix clang error

error: constexpr function never produces a constant expression [-Winvalid-constexpr]

[#3300] Added ChangeLog

[#3300] Fixed db-reconnect issue

src/bin/dhcp4/ctrl_dhcp4_srv.cc
    ControlledDhcpv4Srv::processConfig(isc::data::ConstElementPtr config)

src/bin/dhcp6/ctrl_dhcp6_srv.cc
    ControlledDhcpv6Srv::processConfig(isc::data::ConstElementPtr config)

[#3210] address review

[#3210] fix different exception message on BSD

[#3210] fix some warnings

[#3210] clean up some header includes

[#3210] update copyright dates

[#3210] miscellaneous warning fixes in lib/util

- Wsign-compare
- Wshadow
- doxygen warnings
- fix compilation for src/lib/util/tests/Makefile.am

[#3210] refactor string utilities

- Rename util/strutil.h to util/str.h to escape redundancy.
- Simplify trim function.
- Remove unused functions.
- Get rid of the regex conditional compilation that helped Kea build
  with ancient compilers. Lack of proper regex functionality now results
  in failure in configure.ac.

[#3210] refactor io utilities

- Rename util/io_utilities.h to util/io.h to escape redundancy.
- Create readUint and writeUint templates.
- Use reverse_copy for potential performance boost.
- Add missing unit tests.

[#3210] refactor file utilities

- Unify filename.h and file_utilities.h under filesystem.h.
- Rename Filename class to Path since it more accurately represents
  it.
- Make its interface as close as possible to that of std::filesystem::path.
- Remove unused method expandWithDefault.
- Rename useAsDefault to replaceExtension since it was only used in the
  purpose of replacing extension.
- Unroll the split method in the constructor.

[#3210] properly match header names with regex

[#3210] add ability to format changed files

[#3267] cosmetic changes to find headers script

[#3267] add EXCLUDE_LIST in find headers script

[#3267] fix find header script not finding files

Script did not find files that are on the same line as the _HEADERS
variable.

[#3267] cosmetic changes to find headers script

[#3267] add tools/find-uninstalled-headers.py

[#3267] added ChangeLog entry

[#3267] unify tabs

[#3267] add missing include_HEADERS

- missing headers in libkea-util
- missing headers in libkea-util-io

[#3267] add missing include_HEADERS

- missing headers in libkea-dhcpsrv

[#3267] add missing include_HEADERS

- missing headers in libkea-d2srv

[#3267] add missing include_HEADERS

- missing headers in libkea-cfgclient

[#3267] add missing include_HEADERS

[#3262] reword RADIUS doc

[#2692] Addressed comments

[#2692] Added a ChangeLog entry

[#2692] Added unit tests

[#2692] Checkpoint: code done, need UT

[#3212] restore code after rebase

[#3212] reformat UT file

[#3212] doxygen docs fixes

[#3212] restore UTs

[#3212] remove redundant specifier

[#3212] reorder namespaces

[#3212] update includes

[#3212] code reformat

[#3212] NULLs refactor

- introduce 0 instead of NULL

[#3212] refactor function name

- introduce camelCase name

[#3212] refactor time utils

Step 2: implement time utils in lib dns

[#3212] refactor time utils

Step 1: remove from lib/utils

[#3249] hammer fix

 - hammer supported-systems works again

[#3211] Renamed getDataAsVP

[#3211] Removed remaining InvalidBufferPosition

[#3211] Replaced InvalidBufferPosition exception by OutOfRange

[#3211] More cosmetic changes (3)

[#3211] More cosmetic changes (2)

[#3211] More cosmetic changes

[#3211] More new getVector use cases

[#3211] Almost done

[#3211] Checkpoint: rewrote InputBuffer

[#3253] addresed review

[#3253] Renamed end_event to stop_event

src/hooks/dhcp/perfmon/alarm.*
src/hooks/dhcp/perfmon/monitored_duration.*
src/hooks/dhcp/perfmon/tests/alarm_unittests.cc
src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc
    - renamed DurationKey::end_event_ to DurationKey::stop_event_

[#3253] Added report due time finders

src/hooks/dhcp/perfmon/monitored_duration.*
    MonitoredDuration::getCurrentIntervalStart()
    MonitoredDuration::expireCurrentInterval() - new functions

src/hooks/dhcp/perfmon/monitored_duration_store.*
    MonitoredDurationStore::getReportsNext()
    MonitoredDurationStore::getOverdueReports() - new functions

src/hooks/dhcp/perfmon/tests/monitored_duration_store_unittests.cc
    TEST_F(MonitoredDurationStoreTest, reportDue*) - new tests

src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc
    TEST(MonitoredDuration, expireInterval) - new test

src/lib/dhcp/pkt.h
    static boost::posix_time::ptime& MIN_TIME()
    static boost::posix_time::ptime& MAX_TIME() - new functions

[#3253] Use modify() to do inplace updates

src/hooks/dhcp/perfmon/alarm_store.cc
    AlarmStore::checkDurationSample() - revamped to use multi_index::modify

src/hooks/dhcp/perfmon/monitored_duration_store.*
    MonitoredDurationStore::addDurationSample() - revamped to use multi_index::modify
    Added index on current interval start time

src/hooks/dhcp/perfmon/tests/monitored_duration_store_unittests.cc
    Took out speed check UTs, left function

[#3253] fixed returns with no space

modified:
    src/hooks/dhcp/perfmon/alarm_store.cc
    src/hooks/dhcp/perfmon/monitored_duration_store.cc

[#3253] Doxygen clean up

../../../../doc/devel/Doxyfile
    Added perfmon dir

modified:
    alarm.h
    alarm_store.h
    monitored_duration_store.h

[#3253] Added In-place alarm checking

src/hooks/dhcp/perfmon/alarm_store.*
    AlarmStore::checkDurationSample() - new function to check a sample
    against an alarm in-place

src/hooks/dhcp/perfmon/tests/alarm_store_unittests.cc
    checkDurationSampleTest(uint16_t family)  - new test function and tests

[#3253] Added in-place duration update

src/hooks/dhcp/perfmon/monitored_duration.*
    MonitoredDuration::MonitoredDuration() - new copy ctor
    DurationDataInterval::operator==() - added for UTs

src/hooks/dhcp/perfmon/monitored_duration_store.*
    MonitoredDurationStore::addDurationSample()
    - new function for adding sample to duration in-place
    MonitoredDurationStore::addDuration()
    - removed optional sample parameter

src/hooks/dhcp/perfmon/tests/monitored_duration_store_unittests.cc
    addDurationSampleTest(uint16_t family)  - new test func and tests

src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc
    TEST(MonitoredDuration, copyConstructors) - new test

[#3253] Added AlarmStore classes

src/hooks/dhcp/perfmon/alarm_store.h
src/hooks/dhcp/perfmon/alarm_store.cc
src/hooks/dhcp/perfmon/testsalarm_store_unittests.cc
    new files

src/hooks/dhcp/perfmon/Makefile.am
   Added alarm_store.cc and alarm_store.h

[#3253] Minor cleanup

modified:
   monitored_duration_store.cc
   monitored_duration_store.h

[3253] Removed clutter

modified:   monitored_duration_store.h

[#3253] Full CRUD for MonitoredDurationStore

MonitoredDurationStore implements CRUD for primay
key index, along with UTs.

[#3253] Initial commit of MontioredDurationStore

Initial implemention of MonitoredDurationStore and UTs

src/hooks/dhcp/perfmon/tests/monitored_duration_store_unittests.cc
src/hooks/dhcp/perfmon/monitored_duration_store.cc
src/hooks/dhcp/perfmon/monitored_duration_store.h
    new files

src/hooks/dhcp/perfmon/Makefile.am
    added monitored_duration_store.cc monitored_duration_store.h

src/hooks/dhcp/perfmon/monitored_duration.*
    Added  ==, !=, < operators

src/hooks/dhcp/perfmon/tests/Makefile.am
    added monitored_duration_store_unittests.cc

src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc
    TEST(DurationKey, equalityOperators) - new test

[#3262] Optimized getSubnet() (#3268 1st point)

[#3262] check parking limit on subnet select

[#3262] on completion callback for subnet select

[#3262] document RADIUS thread-pool-size

[#3280] Added performance.dox to Makefile.am

modified:   doc/devel/Makefile.am

[#3280] Updated Doxyfile

Ran "doxygen -u" with doxygen 1.10.0 to update our Doxyfile
Cleared up several warnings and eliminated dot errors in crypto lib.

[#3280] Fixed a few more

Fixed errors that should have been reported but
do not under doxygen 1.8.17

modified:
../../src/bin/dhcp4/dhcp4_srv.h
../../src/lib/dhcp/pkt.h

[#3280] Fixed new errors after rebase

src/lib/dns/char_string.h
src/lib/dns/txt_like.h

[#3280] Fixed typos

[#3280] Fix performance hierarchy

modified:
    mainpage.dox
    performance.dox

[#3280] Added stub Performance page

Performance subpage was missing.  Added with simple content.

[#3280] Fixed doxygen commentary errors

Removed failing references to private class members,
Added missing paramters
miscellaneous other errors

[#3285] Removed GENERATE code and tests

[#3208] reordered includes

[#3208] Removed define 1 in include guards

[#3208] Revamped registry UTs

[#3208] Restore CH A RR

[#3208] Removed spurious tabs and spaces

[#3208] Got rid of non-C++ NULL

[#3208] fix Makefile

[#3208] clean up code

[#3208] added not implemented types

[#3208] restore unittests

[#3208] remove unused code in libdns

[#3270] Make Perfmon addSampleAndClear UT reliable

src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc
    TEST(MonitoredDuration, addSampleAndClear) - reworked to remove
    timing sensitivity

[#3190] addressed review comments

[#3190] fixed ASAN warnings