[ticket/10854] sql server drop default constraint when dropping column

drops default columns with T-SQL before attempting drop column to
avoids sql exception.  This is a huge annoyance in UMIL scripts running
under sql server.
[ticket/11162] Extract existing behavior into a function and add a test.

PHPBB3-11162
[ticket/11162] Use integer casting instead of SQL escape.

PHPBB3-11162
[ticket/11162] Rename count variable name to remaining_rows.

PHPBB3-11162
[ticket/11162] Make count function upper case.

PHPBB3-11162
[ticket/11219] Update sequence values after loading fixtures

If a value is provide for an auto_increment type of column, certain DBMSes
do not update their internal sequencers. If a row is inserted later, it can
be given an ID that is already in use, resulting in an error. The database
test cases now resynchronise the sequencers before the tests are run.

PHPBB3-11219
[ticket/11219] Add unit test for inserting into a sequence column

PHPBB3-11219
[ticket/11219] Recreate Oracle sequences instead of altering them

The previous method would always leave a gap between the last value and the
new one due to how you have to update the sequence values. To remove gaps in
all situations, the options are to alter the USER_SEQUENCES table or just
drop the sequence and recreate it. The prior requires elevated priveleges
and the latter can break attached objects. Since we don't attach objects to
the sequences, we won't have any problems doing it for the tests.

PHPBB3-11219
[ticket/11227] @return void -> @return null in develop-olympus.

PHPBB3-11227
Merge remote-tracking branch 'p/ticket/11227' into develop-olympus

* p/ticket/11227:
  [ticket/11227] @return void -> @return null in develop-olympus.
[ticket/10184] Disable receiving pms for bots by default

PHPBB3-10184
[ticket/10184] Query bots table to get the user_ids of the bots

PHPBB3-10184
Merge PR #893 branch 'nickvergessen/ticket/10184' into develop-olympus

* nickvergessen/ticket/10184:
  [ticket/10184] Query bots table to get the user_ids of the bots
  [ticket/10184] Disable receiving pms for bots by default
[ticket/11162] An implementation that actually works.

PHPBB3-11162
[ticket/11162] Uncomment transactions.

PHPBB3-11162
[ticket/11162] Clarify that only the two tables actually work.

PHPBB3-11162
[ticket/11162] Use phpbb_update_rows_avoiding_duplicates in mcp.

PHPBB3-11162
[ticket/11162] Fix inaccurately copy pasted comment.

PHPBB3-11162
[ticket/11162] No whitespace changes in olympus.

PHPBB3-11162
[ticket/11219] Only update sequences that are affected by a fixture

PHPBB3-11219