0.9.9.1: 
	* fixed possible segfault

0.9.9: 
	* added option 'syslogdebug' to enable debugging via syslog
	* added option 'resetinterval' to restart a port after the 
	specified amount of seconds

0.9.8:	
	* fixed segfault when shutting down/ initializing unconfigured
	Ports
	* fixed one way audio problem with 3. Module
	* added cid_prefix option for adding prefixes on national calls
	(calls without a leading '+')

0.9.7:
	* added general option "skip_plus" to remove the leading '+'
	from the callerid
	* fixed some bugs in the callerid handling, which could cause
	segfaults and wrongly displayed callerids

0.9.6:	
	* setting busy cause when the endpoint is busy
	* playing early audio now, so we hear network 
	anouncements like alerting and "number invalid" 
	and so forth