Keep the external receiver referenced while processing a watched message.
This avoids a race condition leading to segfault.
Idle instead of yielding while waiting for a socket to absorb data.


git-svn-id: http://yate.null.ro/svn/yate/trunk@5423 acf43c95-373e-0410-b603-e72c3f656dc1
Merge branch 'upstream' of github.com:vir/yate into deb
Updated debian package version to 4.3.1~svn5423