Andrew Tridgell f8bebf91ab some more work on the byte range locking ...

note the ugly global_smbpid - I hope that won't bethere for long, I
just didn't want to do two lots of major surgery at the one time.
Using global_smbpid avoids the big change of getting rid of our
inbuf/outbuf interface to reply routines. I'll do that once the
locking stuff passes all tests.

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..

brlock.c

the bulk of the new byte range locking coode

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locking.c

some more work on the byte range locking

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