'find' TreeIndex class member was fixed. Now allocate enough space for key_data.

Spelling fixes in the error message file.

Add more information to the error when key cardinality
doesn't match index cardinality in exact match.

Avoid server start/stop in box_big/hash.test (ugly,
but until we have named/dynamic spaces, which are already in the
pipeline, we should not make our test procedure slower).

Rename multipart-pk.test to tree_pk_multipar.test:
consistently use underscores, not dashes, in file
names.

(Unrelated) Recycle more error codes.

Make keyValue an inline function to save a few CPU cycles.

Avoid creation of an extra table in box.lua just to find out
variable list array cardinality.

Revert changes to box.update():
a) they break backward compatibility

This reason alone should be sufficient. There must be no changes
which break backward compatibility in a stable release, unless
it's a fix for a crashing/security bug.

box.update() changes got to be done in a separate task,
and should not break backward compatibility.

Leave update_ol for now, to test multi-part primary key updates,
even though the function itself is quite heavy, hardly something
we can recommend while running Lua procedures in production.

Warnings was removed. Minor coding-style cleanup.

This reverts commit 8dc70aac.

Minor code clean-up.

Make sure we do not try to destroy uninitialized
mutexes in the snapshot thread.

Implement FIFO policy for the wal writer queue.

Code review fixes:
     - Key validation procedure was moved to Index classes;
     - Additional hash tests was added.

This patch introduces wal_mode configuration variable,
which can take either "fsync" or "fsync_delay" values.

In "fsync" mode, we open the write ahead log in O_SYNC
mode, and thus sync every write to disk.

Th fsync_delay mode is the backward-compatible mode:
in this mode, we only do fsync once every fsync_delay
seconds. If fsync_delay is 0, there is no fsync.

Otherwise, this patch is only adding auxiliary headers,
object files, etc.

Check grammar in comments. Fix an incorrect
assert. Add a test which triggers the assert.
Add a few more tests for combinations of insert, delete
and set.

review fixes:
 - update_op_cmp was improved;
 - update_field_init function was refactored;
 - field struct member 'old_end' was renamed to 'tail'.

Code review minor fixes.

Code review minor fixes.

Review fixes:
  - Minor comments fixes;
  - INSERT operation behavior was changed: now INSERT operation was allowed
    under field next to last.
  - UPDATE connector/c tests was updated.

Actually, make the feature work.
Add syntax to Lua to be able to delete fields.
Fix a bug when we delete all fields in a tuple and happily
crash thereafter.

- INSERT AFTER operation was deleted;
- INSERT BEFORE was renamed to INSERT;
- Tarantool connector/c was updated;
- Tests was updated.

minor stylistic changes

Multipart primary key implementation was added. DELETE and UPDATE commands was
updated for multipart key supporting.

(https://bugs.launchpad.net/tarantool/+bug/955226)