Core:
  - fix telling libev about forks.

Conflicts:
	core/CMakeLists.txt
	core/fiber.m
	third_party/valgrind/valgrind.h

Core:
  - salloc_destroy was removed from tarantool_free routine
Test environment:
  - new option 'valgrind_disabled' was added to suite.ini;
  - box/show test was renamed to box/admin test;
  - box/admin test was splited to admin adn admin_coredump tests.

This allows to immediately call from modules stored
procedures defined in the administrative console.

Test environment:
 - test-run.py script was reformated to PEP8.

Instead of using "print" and fiber->iov
to return results to the client, change the Lua procedures
implementation to simply send to the client all return values
of a procedure. A procedure, in turn, can return tuples, integers
(and, in future, strings, Lua tables or whatever).

This allows nicely to call one procedure from another, and use its
results in Lua, and call the very same procedure from the binary
protocol, and still be able to process its results on the client.

Test enviroment:
  - old valgrind.sup file was deleted (not needed any more).
  - unused options in suite.ini files was removed.

Test enviroment:
  - checking empty tests list was added =;
  - valgrind suppressions routine was updated.

Remove dead code from txn_cleanup(), which
would check that txn_cleanup() is not called twice:
this code is from the time when we used

Rename txn_abort() to txn_rollback().
Rename txn_alloc() to txn_begin().

Introduce box_out interface, used to
send box results to the client. Lua uses
this interface to intercept returned tuples
and push as return values to Lua stack.

Make iov_add/iov_dup inline, as they used
to be. They are now mostly used from within
callbacks.

Make txn_commit()/txn_rollback() non-static
as they are now used in memcached.m.

Introduce memcached_get(): implementation
of Memcached GET statement. Wrap memcached_get()
in proper txn_begin()/txn_commit()/txn_rollback(),
and handle failure of memcached_get() by
rolling back the transaction.
Split BOX_QUIET to two flags: BOX_GC_TXN and
BOX_QUIET.
BOX_QUIET had a side-effect that txn_cleanup()
was done immediately, rather than by fiber_gc().
This had the side effect that txn_commit() could
not be used in memcached_get(), because in
memcached_get() we need both BOX_QUIET and txn_cleanup()
called from fiber_gc().

Now that we have box_out interface, eliminate
BOX_QUIET flag completely, and use box_out_quiet
set of callbacks instead.

Test enviroment:
  - start/stop server routine was updated.
Tests:
  - fix double start srvers.

Conflicts:
	test/box/valgrind.sup

valgrind.sup path updated

* valgrind suppresions update

Test envirment:
 - stop server routine was updated;
 - valgring start options was updated.
Valgrind:
 - suppressions was updated.

* process handle routines in test enviroment was updated.

Fix a bug when Tarantool exceptions were intercepted
by Lua in lua_pcall(), and converted to Lua errors.
Let Tarantool exceptions pass freely through Lua, by using
lua_call() instead of lua_pcall().

In case of any Lua error lua_call() aborts execution of the
entire process. Register lua_atpanic that converts
lua errors to Tarantool exception ER_PROC_LUA.

Unwinding the stack in this manner didn't work properly
with libcoro 6.0, which we were using. Update
libcoro library to version 6.06 to fix this problem.

Complete the renamve of all iov functions.

Spell check the comments.
Remove unnecessary changes. Be strict about
not including more than necessary.
Update copyright headers.
Do not put static functions after non-static:
a function can become non-static in future,
and it should not require moving it around in
the .m file.

Rename all iov_ functions to use a common prefix.
This is used in the patch which adds hides box output
behind an interface, and allows results of
box.process() to be returned directly into Lua.

Conflicts:
	core/tarantool.m
	test/box/valgrind.sup
	test/lib/server.py

* atexit memory freeing scheme
* reachable allocations cleanup

* core signal handling sigaction -> libev
* suppresion file updated

Fix a memory leak when remote address was allocated
in etet_pool (eternal memory pool) in recovery_follow_remote
(start of replication).

Remove fiber->data, as redundant and confusing.
fiber->f_data is sufficient for all possible needs.

Fix a bug when fiber_server::data was never initialized
but passed to "on_bind" callback of fiber_server
(this worked since no single "on_bind" callback uses
its "data" argument).

Conflicts:
	cfg/tarantool_box_cfg.c
	cfg/tarantool_feeder_cfg.c
	cfg/tarantool_feeder_cfg.h
	test/CMakeLists.txt

Function tnt_io_sendvu was moved to tnt_io_sendv_direct. Compile flags was
added. Warning was clean-uppend.

Function tnt_io_sendvu was renamed to tnt_io_sendv_direct
Check IOV_MAX routine in tnt_io_sendv_direct was added.

* size's update

* size/count types update

Conflicts:
	connector/c/tnt_io.c

tnt_io_connect_do routine was updated.

* connection tmout signals handling

* tnt_set_allocator()
* tnt_tuplef()

Function was moved to tuple implementation. Funcnion valid_tuple was
renamed to tuple_length.

The box tuple implementation was moved to separate file. Tuple flags
NEW and SEARCH was removed (unused). box_mode enum was removed (unused).