Jeremy Allison eb861e9d0f Fix for very subtle POSIX lock interaction race condition found by ...

Herb. We need to unlock POSIX locks before notifying pending lock
processes.
Jeremy.

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brlock.c

Fix for very subtle POSIX lock interaction race condition found by

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locking.c

Fix for very subtle POSIX lock interaction race condition found by

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posix.c

Fixes for HPUX only having limited POSIX lock range from Michael Steffens <michael.steffens@hp.com>

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