Apply patch from MIT KRB5 GIT tree commit: 043533c2f13d2bc69316.
libgssrpc was ignorant of the remote address of the kadmin socket,
even when it's IPv4. This made old-style GSSAPI authentication fail
because it uses the wrong channel bindings. Fix this problem by making
clnttcp_create() get the remote address from the socket using getpeername()
if the caller doesn't provide it and it's an IPv4 address.
Submitted by: Ben Kaduk <email@example.com>