Make OpenSSL cypher stealing functions static so compatible with H323Plus

git-svn-id: svn://svn.code.sf.net/p/opalvoip/code/ptlib/trunk@31136 023b2edf-31b2-4de3-b41e-bca80c47788f
Fixed updating STUN after changing server hostname/address.

git-svn-id: svn://svn.code.sf.net/p/opalvoip/code/ptlib/trunk@31137 023b2edf-31b2-4de3-b41e-bca80c47788f
Fixed VS project include/lib paths for MergeSym release mode.

git-svn-id: svn://svn.code.sf.net/p/opalvoip/code/ptlib/trunk@31138 023b2edf-31b2-4de3-b41e-bca80c47788f
Merged revision(s) 31078-31153 from ptlib/branches/v2_12:
---------------------
r31152
Added Windows 8.1 OS name.
---------------------
r31150
Added PTime::GetElapsed() for real time elapsed since PTime value.
---------------------
r31141
Update symbols
---------------------
r31109
Variable renaming to fix warnings when compiling with -Wshadow


git-svn-id: svn://svn.code.sf.net/p/opalvoip/code/ptlib/trunk@31154 023b2edf-31b2-4de3-b41e-bca80c47788f