Now when the client argument format was changed, and it has new features,
bump its version.

If there is an exception in a background (detached) fiber,
log it to the error log.

Provide a way to modify fiber name, so that created
background fibers can be distinguished by their name
(currently they all are called "lua").

bugfix https://bugs.launchpad.net/tarantool/+bug/1045830

The assert() in tt_pthraed_error()
would always fail, since it was checking for e == 0, and
e could be equal to ETIMEDWAIT.

Produce a more verbose error message if failed to restart
from a snapshot.

Failure recovery: don't confirm rolled back LSNs.
Transactions are rolled back in the order, reverse to the initiation
order. Thus we first confirm the greatest LSN, then the one
preceding it, and so on. If we confirm LSNs of these
transactions, it can be done only out of order.

At better diagnostics to the failure of partial write. Rewrite
save_snapshot() to produce more diagnostics.

Truncate the log file in case of a partial write:
simple lseek() to the last good offset is not enough,
since, if we choose to close the file, we may still have
garbage at the end of the file.

Fix a coding bug in the patch which suppresses unnecessary warnings.
Add a comment.

When there was a partial write, rollback would
first confirm LSNs of requests which are only trying
to enter the queue, and only then LSNs of committed
or rolled back events.

Always put requests into the queue, even if we know
that they will be rolled back. This guarantees
a correct LSN order in confirm_lsn().

Split the rollback queue around the first not written
request, not around the first request in the batch.
In case of a partial write we may have written
a few requests at the head of the batch.

A fix and a test case for Bug#1043858
"server crash on lua stack overflow on CentOS 5.4"

Workaround a bug in libobjc2 which would mistakenly
try to catch a foreign exception in @catch (id e) frame,
when there is a @finally down the stack.

A test case is added to the test suite.

A refined test case is sent to the libobjc2 maintainer.

console client log flush prior to close.

Make sure we don't crash on NULL argument of error().

The wal writer thread could write a wrong fiber
name into the log, when logging about WAL rotation.
vsay() takes the current fiber name from a global
variable, and it's changed dynamically by the concurrent
thread (the front end thread).