ipc.c: Adding Andrews become_root code to the main branch.

ipc.c: Adding Andrews become_root code to the main branch.
locking.c: Adding Andrews become_root code to the main branch.
pipes.c: Fixing the close_file issue.
proto.h: The usual.
reply.c: Move smb_pass into NTDOMAIN defined code. Fixing the close_file issue.
server.c: Fixing the close_file issue.
trans2.c: Fixing the close_file issue.
uid.c: Adding Andrews become_root code to the main branch.
Jeremy (jallison@whistle.com)
(This used to be commit 16fd4337f79ce33f91050c96c4a566221c5d9126)