Updated osplibversion.h and RELNOTES.txt to prepare 4.5.1.
Merged branch 4.5 changes to 4.5.0 into trunk.
Version 4.5.0
Updated RELNOTES.txt for release 4.5.0.
Updated to support more SIP response codes.
Created branch 4.5.
Updated osplibversion.h and RELNOTES.txt to prepare 4.4.4.
Merged branch 4.4 changes to 4.4.3 into trunk.
Version 4.4.3
Updated to support 603 Decline status code.