[#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

[#3190] fix ASAN warnings

[#3190] use smart pointer to capture IOService instance

[#3271] bump version in configure.ac to 2.5.7

[#3263] release changes

[#3263] release changes

[#3261] bump up library versions for 2.5.6 release

[#3193] fixed double free when using botan

[#3025] fix ProcessSpawn on BSD

- Always break after collecting exit status. Previously it broke the
  loop always on failure of waitpid which does happen after calling it
  subsequently, but there is no reason to wait until then.
- When waitpid returns -1 in sync mode, throw exception, except for
  EINTR which happens on signals (usually one time) prior to
  the child process exiting if sigaction is called without SA_RESTART
  which is the default on some systems.
- Only initialize the global IO signal set on the IO service in async
  mode. It makes no sense to do it in sync mode because there is no IO service.
- Swap pid and wpid names to conform to names in `man wait` on BSD.
- Add FAIL() on timer expiration.
- Don't call runOne() the third time in unit tests because it waits for
  the timer to expire.

[#3141] addressed review comments

- Mostly further corrections in ARM docs and in comments.

[#3141] addressed review comments

- refactored code of SvcParam config parser
- added new 2 UTs
- added some more comments in code

[#3141] addressed review comments

- Rephrased some text in ARM docs.
- Added new text to ARM docs.

[#3141] fix compilation error

[#3141] ChangeLog entry

[#3141] ARM docs updated

[#3141] delete excessive dnr.json examples

[#3141] json examples update

[#3141] restore delimiter escaping

[#3141] provide RFC in comments

[#3141] DNRv4 UTs edited

[#3141] option definition UTs fix

[#3141] DNRv6 UTs edited

[#3141] unpack SvcParams from hex data

[#3141] DNRv4 config parser

[#3141] pack SvcParams to buffer

[#3141] unpack dohpath SvcParam

[#3141] unpack port SvcParam

[#3141] unpack alpn SvcParam

[#3141] config parser wip

[#3141] added ALPN-IDs

[#3141] config parsers boilerplate

[#3141] make dnr options type internal

[#3141] List of Service Parametes (DNR) added

[#3141] Doc updated for v6 DNR option

[#3141] ARM updated

 - Added DNR description
 - added to list of supported RFCs
 - Also removed one server limitation that's no longer valid
   (because we have ping-check). Not related, but small enough.

[#3245] Minor UT change

modified:   src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc

[#3245] Wordiing fix

modified:   pkt_filter_lpf.cc

[#3245] addressed review

[#3245] Remove wrong doxygen use in UT

modified:   alarm_unittests.cc
modified:   monitored_duration_unittests.cc

[#3245] Moved Alarm into own files

new file:   src/hooks/dhcp/perfmon/alarm.cc
new file:   src/hooks/dhcp/perfmon/alarm.h
new file:   src/hooks/dhcp/perfmon/tests/alarm_unittests.cc

modified:   src/hooks/dhcp/perfmon/Makefile.am
modified:   src/hooks/dhcp/perfmon/monitored_duration.cc
modified:   src/hooks/dhcp/perfmon/monitored_duration.h
modified:   src/hooks/dhcp/perfmon/tests/Makefile.am
modified:   src/hooks/dhcp/perfmon/tests/monitored_duration_unittests.cc

[#3245] Fixed unused variable warning

src/lib/dhcp/pkt_filter_inet6.cc
    PktFilterInet6::openSocket() - added errmsg to exception text as originally intended

[#3245] Adds fundamental classes to perfmon

src/hooks/dhcp/perfmon/monitored_duration.cc
src/hooks/dhcp/perfmon/monitored_duration.h
    New files that add DurationDataInterval, DurationKey, Alarm, and MonitoredDuration classes

src/hooks/dhcp/perfmon/monitored_duration.h
New file of unit tests for new classes

modified:   Makefile.am
modified:   tests/Makefile.am

[#2022] Added a comment about yhe unparking race

[#2022] Added parking points

[#2022] Checkpoint: added methods

[#3025] fix missing include

[#3025] add ChangeLog entry

[#3025] fix distcheck

[#3025] use admin-utils.sh based on location in upgrade scripts

[#3025] address review comments

[#3025] appease shellcheck

 . "${admin_utils}"
  ^--------------^ SC1090: Can't follow non-constant source. Use a directive to specify location.

    version=$(checked_mysql_version)
              ^-------------------^ SC2119: Use checked_mysql_version "$@" if function's $1 should mean script's $1.

... and others that spiraled afterwards

[#3025] simplify logic in ensureSchemaVersion

... and allow kea-admin path to be overridden in tests.

[#3025] re-enable ProcessSpawnTest.isRunningSync

[#3025] fix location detection in kea-admin

[#3025] add isFile

[#3025] document automatic db init

[#3025] add unit tests

[#3025] sync kea-admin in db connection and fix interaction with retry

[#3025] add ability to wait sync in ProcessSpawn

[#3025] add db init on startup to other managers

[#3025] switch io service to DatabaseConnection's

[#3025] minor changes to kea-admin

- Reword 'Database version' to 'Schema version'.
- Remove a newline that was present only when running mysql operations
  and not for postgresql operations. It was more visible since now it
  appeared in the kea logs.
- Remove some extraneous exits. They weren't in the way of anything, but
  weren't doing anything either.

[#3025] add ability to inherit env in ProcessSpawn

[#3025] automatic init of postgresql schema

[#3025] convert db access params to kea-admin

[#3025] automatic init of mysql schema

[#3130] trim trailing slash