Clear errno for UNIX socket connections as well.

Make the formatting of the test output platform-independent.

Do not align maxalloc (the limit on the amount of memory
used by the allocator), it's not necessary.

Make an effort to correctly align large (for 32 bit) prealloc
values (like, a few gigs).

closes #gh-280.

closes #gh-238.

This patch fixes out of bounds memory access in bit_iterator_init
for size == 0. The patch also optimizes bitset/index library to skip
useless iterations over empty keys.

Closes #425

Fixes gh-372: assertion failure with a function
which inserts increasingly large tuples.

Make sure oom.test cleans up after itself.
Fix a slab leak when recycling a factored pool in small object
allocator.

Rename auth_access.test to access_misc.test (easier to run all tests in a
group).

Remove races in the test.
Re-enable the test after 'console' patch.

Also fix session.storage.test.lua (broken if called multiple times).

Check that commit/rollback works.
Put statements on a single line, so that there is no implicit yield.

In SQL, COMMIT does not cause an error if a transaction
is not started, since it's a "transaction-initiating statement".
Follow the same semantics in Tarantool.

session was moved to box.session

gh-409: connect followed by session.su causes privilege error

The problem was in the order of access checks
for functions:
    if a user has no universal access,
        find function
        check if a user has rights to execute the function

There were no pre-created function object for
'dostring', so access check for this function failed.

The fix is to give universal access to ADMIN user
right in bootstrap.snap and remove check for ADMIN uid
as a special case from access checks.
This avoids a functio lookup which would still find nothing.

The fix revealed a race condition in replica bootstrap
(see changed replication tests):
replica begins accepting requets before fully recovering.
Add a manual check for full replica recovery to make
the tests pass.

Closes #407

"Granting a priivlege revokes an existing grant".

Fix a coding bug in grant/revoke Lua functions.

Update tests.

Fixes gh-421.