Make struct cmessage visible from socket.h (about 4 places were
defining it for themselves which wasn't good)
Make __rpc_get_local_uid() useable and give it prototype that's
visible.
Fix some issues with printing out usernames from rpcbind and keyserv.
This version supports both the keyserv v1 and v2 protocols. It uses the
new AF_LOCAL transport so that only local processes can use it for
storing/retrieving keys, and it uses the SCM_CREDS kernel hack for
authentication. With these two modifications, we don't need the keyenvoy
program normally used with RPC 4.0.
Note that if libdes.so.3.x is present on the system when keyserv
is started, Secure RPC will run with normal DES encryption. If not,
everything falls back to RC4 with a 40 bit key.
