MFC r241141, r241165, r241165, r241181;

MFC	 r241141, r241165, r241165,  r241181;

rpc: convert all uid and gid variables to u_int.

Follow a similar change in Solaris and linux where the uid and
gid variables were made more similar to what the system expects.
In our case we use u_int which is what XDR can manage,

Reviewed by:	bde

git-svn-id: svn://svn.freebsd.org/base/stable/9@241309 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f