sunrpc: Use userns friendly constants.

Instead of (uid_t)0 use GLOBAL_ROOT_UID.
Instead of (gid_t)0 use GLOBAL_ROOT_GID.
Instead of (uid_t)-1 use INVALID_UID
Instead of (gid_t)-1 use INVALID_GID.
Instead of NOGROUP use INVALID_GID.

Cc: "J. Bruce Fields" <[email protected]>
Cc: Trond Myklebust <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
4 files changed