locking.c: Print messages when we downgrade a lock.

locking.c: Print messages when we downgrade a lock.
reply.c: Do the same mask expansion we do in trans2.c - needed for Win98.
trans2.c: Make the mask expansion into a function call now we have to
          do it twice.
Jeremy.
(This used to be commit 7b3a9d6285cc0d1967155a68845e28c6296ecc67)