* Various changes to allow channel bindings to work with both UDP

	* Various changes to allow channel bindings to work with both UDP
 	and TCP cleanly [krb5-libs/180]:

	* auth_gssapi.c: remove the special-case exception to channel
 	bindings failure added in the previous revision, since we now
 	solve the problem by making channel bindings not fail

	* clnt_udp.c: use a connected socket so that the client can
 	determine its own source address with getsockname

	* svc.h: add xp_laddr and xp_laddrlen fields to SVCXPRT structure

	* svc_tcp.c: set xp_laddr and xp_laddrlen when a connection is
 	established

	* svc_udp.c (svcudp_recv): use recvmsg with MSG_PEEK followed by
 	recvfrom in order to determine both source and dest address on
 	unconnected UDP socket, set xp_laddr and xp_laddrlen

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@9600 dc483132-0cff-0310-8789-dd5450dbe970