2006-06-22
	* added function supports_extension

2006-06-21
	* corrected bug in get_expiration_value (result was always -1/1)
	* is_terminating_notify changed to use Subscription-State parser

2006-06-13
	* added few common SIP/SER functions into sip_utils.h
	* added functions for traversing hash table

2006-05-11
	* added changelog
	* added "simple profiling" capability (need to call PROF_START and
	PROF_STOP macros in profiled routine)