Created by Kostja Osipov and last modified
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364. By Kostja Osipov

Merge with the latest Percona Server 5.5

363. By Kostja Osipov

Fix a sporadic failure of rpl_err_ignoredtable.test

Wait until the connection asking to acquire a user lock
gets killed before dropping the tables, to avoid a deadlock.

362. By Kostja Osipov

Merge with upstream (percona-server).

361. By Kostja Osipov

Address comments on the user lock patch:
- rename MDL_key::USER to MDL::USER_LOCK, to make the patch
work when compiled with GCC 4.3
- add boundary limits check for user lock name

360. By Kostja Osipov

Implement multiple user-level locks per connection.

GET_LOCK() function in MySQL allows a connection to hold at most
one user level lock. Taking a new lock automatically releases the
old lock, if any.

The limit of one lock per session existed since early versions
of MySQL didn't have a deadlock detector for SQL locks.
MDL patches in MySQL 5.5 added a deadlock detector,
so starting from 5.5 it became possible to take multiple locks
in any order -- a deadlock, should it occur, would be detected
and an error returned to the client which closed the wait chain.

This is exactly what is done in this patch: ULLs are moved
to use MDL subsystem.

359. By <email address hidden>

Merge lp:~stewart/percona-server/bug959198

357. By Stewart Smith

empty merge from 5.1: handlersocket update

356. By Stewart Smith

merge fix for Bug #1076215: Unnecessary AHI removal in buf_LRU_mark_space_was_deleted

355. By Stewart Smith

merge multiple changed page bitmap file support in XtraDB (and associated bug fixes)

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