repro: configure User-Agent header for registrar, set default value with PACKAGE_VERSION

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10792 ddefafc4-47db-0310-ae44-fa13212b10f2
repro: add TCPConnectionGCAge config option for garbage collection

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10793 ddefafc4-47db-0310-ae44-fa13212b10f2
resip: add support for more aggressive garbage collection, MinimumGcHeadroom

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10794 ddefafc4-47db-0310-ae44-fa13212b10f2
repro: add support for TCPMinimumGCHeadroom

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10795 ddefafc4-47db-0310-ae44-fa13212b10f2
reTurn: add support for configuring software name header in STUN packets

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10796 ddefafc4-47db-0310-ae44-fa13212b10f2