This is mostly a bug fixing release, but it also updates the Amazon AWS IP detection to the current standard.

Changes from 5.13 to 5.14

• update AWS IP detection to IMDSv2
• BUGFIX(RasTbl.h) fix potential memory leak
• BUGFIX(h323utils.cxx) fix detection of 'site local' and 'unique local' IPv6 addresses
• BUGFIX(Makefile.in) restore compatibility with GCC 4, 5 and 6
• BUGFIX(Toolkit.cxx) restore compatibility with very old versions of OpenSSL
• BUGFIX(h323utils.cxx) fix numeric overflow
• BUGFIX(Toolkit.cxx) fix iterator usage (found by Coverity)