perfdhcp avalanche: added ipv6 part

cleaned up protected/public definition of TestControl class

added scen help, code cleanup

added avalanche scenario to perfdhcp

[448-update-cb-cmds-to-handle-parameter-types] Extended SimpleRequiredKeywords with the any type

[#464,!238] ChangeLog updated

[464-vivso-fix] Replaced vivso (v4 specific) by v6 vendor opts option

[#464,!238] Ability to add vendor opts in classes implemented for v6

[#464,!238] New tests for vendor opts in response only implemented

[#464,!238] v6 vendor options moved to separate file

[464-vivso-fix] Fixed copyright years

[464-vivso-fix] A a -> Add a

[464-vivso-fix] Reindented

[#464,!238] User's guide updated

[#464,!238] configs simplified

[#464,!238] vivsoInResponseOnly fixed.

[#464,!238] New unit-test implemented for vendor opts processing

[#464,!238] Reenabled and cleaned up old vendor test

[#464,!238] Truncated vivso option moved to vendor_opts_unittest.cc

[#464,!238] Vendor tests moved to their own name (VendorOptsTest)

[#464,!238] Option 43 tests moved to vendor_opts_unittest.cc

[#464,!238] Moved vendor option tests to a separate file.

[#464,!238] Prototype fix for Genexis clients

[master] Updated ChangeLog for iface::send returned value

[417-incorrect-return-value-of-ifacemgr-send] Fixed interface manager and UDP socket packet filters send returned value

[463-ordering-using-timestamps-without-fractional-part-fails-on-mysql-8] Sort audits by id when the modification timestamps are the same

[#380,!191] Updated description of the error message and comment.

[380-unexpected-boost-include-capture] Added a protection against capture from extra boost in include path

[361-kea-user-s-guide-table-listing-standard-options-uses-hex-instead-of-binary] Fixed type of option 60 vendor-class-identifier

[361-kea-user-s-guide-table-listing-standard-options-uses-hex-instead-of-binary] hex -> binary in option descriptions

[master] Minor correction in INSTALL file.

[master] typo fixed in enable perfdhcp

[master] Added ChangeLog for #451.

[#451,!227] Added unit tests for createBinding/createTriplet methods.

As a result of a review.

[#451,!227] Corrected exception text as a result of review.

[#451,!227] Store "unspecified" triplets as NULL in the MySQL DB.

[366-check-circular_buffer-hpp-existence-in-configure] Added check for boost/circular_buffer.hpp

[master] Added Changelog for #444.

[#444,!229] Added new line in the dhcpdb_create.mysql

[#444,!229] Switched back to second precision in MySQL CB.

[165-netbsd-8-fixes] CCMSG_DATA

[354-compilation-with-mysql-fails-on-fedora-29] Simplified patch

[354-compilation-with-mysql-fails-on-fedora-29] Fixed MySQL hook on MariaDB

[354-compilation-with-mysql-fails-on-fedora-29] Updated schema & upgrade

[354-compilation-with-mysql-fails-on-fedora-29] Solved other issues

[354-compilation-with-mysql-fails-on-fedora-29] Added HAVE_MYSQL_MY_BOOL

[master] Fixed tagged_statements name collision

    Merge branch '447-problems-with-loading-libdhcp_mysql_cb-lib'

[#447,!222] Removed unused function as a result of review.

[426-cassandra-unit-tests-ends-with-success-even-though-they-fail] Made DB script failure to throw

[master] Some trivial doxygen fixes

[master] Added ChangeLog about making perfdhcp build optional

[340-make-perfdhcp-build-optional] Updated doc

[340-make-perfdhcp-build-optional] Removed spurious a

[340-make-perfdhcp-build-optional] typo

[340-make-perfdhcp-build-optional] Made perfdhcp optional (default=no)

[#423,!216] Changelog updated

Corrects flaw in kea-admin util scripts for PostgreSQL
Support #14017

[master] kea-dhcp4 now merges shared-networks from config backend

    Merge branch '399-merge-dhcpv4-shared-networks-fetched-from-the-cb-into-the-configuration'

[#447,!222] Fixed tagged_statement name collision in mysql_cb

src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
src/lib/dhcpsrv/mysql_host_data_source.cc
    Enclosed tagged_statments declarations within
    anonymous namespace to avoid collisions.

[#399,!215] Additional review comment.

[406-update-cb_cmds-with-get-commands] Moved testutils and use runToElementTest

[406-update-cb_cmds-with-get-commands] Typo

[406-update-cb_cmds-with-get-commands] Revert

[406-update-cb_cmds-with-get-commands] Fixed a trivial bug in an old header

[406-update-cb_cmds-with-get-commands] Updated comments

[406-update-cb_cmds-with-get-commands] Expend runToElementTest which is built later

[406-update-cb_cmds-with-get-commands] Added toElement to BackendSelector

[406-update-cb_cmds-with-get-commands] Updated CB exception messages

[#399,!215] Addressed review comments

[#440,!218] Addressed review comments.

[#440,!218] Implemented getSharedNetworkSubnets4 for DHCPv4 CB.

[117-configure-script-doesn-t-fail-when-enable-generate-docs-is-used-and-docbook-style-xsl-is-not-installed] Moved the variable after ./configure as recommended by modern autoconfs

[#117,!207] Added example.

[117-configure-script-doesn-t-fail-when-enable-generate-docs-is-used-and-docbook-style-xsl-is-not-installed] Reviewed and completed generate docs description

[#117,!207] --enable-generate-docs documented.

[117-configure-script-doesn-t-fail-when-enable-generate-docs-is-used-and-docbook-style-xsl-is-not-installed] Made --nonet in xsltproc optional

[144-remove-obsolete-dns-benchmarks] Removing obsolete dns benchmarks in src/lib/dns/benchmarks

[429-Updated-StampedValue-to-support-reals] Fixed the 7.0 issue

[429-Updated-StampedValue-to-support-reals] Added the 7.0 unit test

[#399,!215] kea-dhcp4 now merges in config backend shared netwokrs

src/lib/dhcpsrv/cfg_shared_networks.*
    CfgSharedNetworks4::merge() - new method to merge
    shared network configs

src/lib/dhcpsrv/cfg_subnets4.*
    CfgSubnets4::merge() - reworked to reflect new rules

src/lib/dhcpsrv/srv_config.cc
    SrvConfig::merge() - now merges shared networks

src/lib/dhcpsrv/tests/cfg_subnets4_unittest.cc
    checkMergedSubnet() - convenience function for
    verifying subnet content

    TEST(CfgSubnets4Test, mergeSubnets) - revamped to
    reflect new network assigment rules

src/bin/dhcp4/tests/config_backend_unittest.cc
    TEST_F(Dhcp4CBTest, mergeSharedNetworks)  - enabled test

[master] Added ChangeLog entry for #429.

[#429,!217] Dropped "Signed" in StampedValue::getSignedInteger

[#429,!217] Removed StampedValue::toElement.

[#429,!217] Extend global param test to store bool and real values too.

[#429,!217] Use new function of StampedValue to parse global parameters.

[#429,!217] StampedValue can now parse string values.

[#429,!217] Extended dhcpX_global_parameter: added parameter_type.

[#429] Updated StampedValue to support strings, integers, bool and real.

[#372,!181] hammer: added printing help when no command is provided

[#372,!181] hammer: reduced line lenghts, added docstrings, unified naming, fixed terminating timed out process

[#372,!181] Added many missing comments

[#372,!181] hammer: added distcheck feature, fixed mysql in freebsd

[#372,!181] hammer: hardened running builds, improved building with mysql support

[#372,!181] hammer: fixes after running pylint checker

[#372,!181] hammer: lots of improvements:

- added comments and documentation,
- added missing passing env to execute calls,
- fixed checking revision,
- removed unnecessary code

[#372,!181] Minor fixes in documentation.

[#372,!181] hammer: added checking system revision, fixed prepare-system

[#372,!181] hammer: improved docs, added hammer.py to EXTRA_DIST

[#372,!181] Initial user's guide section for hammer added.

hammer: improved help and commands, added new commands for listing and destroying existing systems