Force a (last) peer ID cache flush when a Channel is disconnected.
This fixes stale "peerid" and "lastpeerid" parameters when a channel is reconnected to another channel that happens to be allocated at the same address in memory.


git-svn-id: http://yate.null.ro/svn/yate/trunk@5816 acf43c95-373e-0410-b603-e72c3f656dc1