A fix for Bug#1017905 "replication failure may leave garbage in the read
buffer".

No test case since this is a runtime error which is hard to emulate.

Clear the read buffer whenever closing a file desriptor, to remove
garbage data from the closed connection.

A fix and a test case for Bug#898198 memcached protocol isn't
case-insensitive.

Make the protocol case-insensitive.
Fix the test framework to be able to match case-insensitive server
queries.
Add a test.

Conflicts:
	mod/box/box.lua

A fix for Bug#987296 "cmake doesn't rebuild all files...
which include TARANTOOL_CONFIG".

Since the dependency between recompiled sources and tarantool
module config is not present anywhere in the code, cmake can
not track it.

Add an explicit object_depends to the relevant target.

Fix alignment of tarantool_mod function.

Tarantool/Box crashed during shutdown if a non running LUA fiber
was created.

Fiber garbage collection in Lua, initiated during shutdown,
was performed after the fiber subsystem was destroyed.

Additionally, fix a wrongly formulated assert which checks
that the fiber which is being cancelled has not been
cancelled already.

Darwin revealed a bug in our free_proc_title() function, which was
added to procitle.c to work well with valgrind: we free argv pointer
even if it wasn't allocated (none of PS_USE_CLOBBER_ARGV/PS_USE_CHANGE_ARGV
was set).

Don't free memory if it wasn't allocated.

Another issue is understanding why Darwin doesn't define
PS_USE_SETPROCTITLE and why our FreeBSD port didn't hit this bug.

(https://blueprints.launchpad.net/tarantool/+spec/lua-builtin-size-of-subtree)

User and developer guides was updated.
next_equal and prev_equal routines was added to index table.

Update .gitignore. Don't use tarantool encoding unless it's
necessary.

Now that we have unit-testing framework, cherry-pick mhash
unit tests from branch feature-hash-test.