* sysdeps/mach/hurd/fcntl.c (__fcntl: case F_GETLK,F_SETLK,F_SETLKW):
Support whole-file locking (only) by using the file_lock RPC. This
has very wrong semantics, but is better than nothing for the time
being. (Correct POSIX.1 locking will require new RPCs in the Hurd
protocols that will be somewhat hairy to specify.)
