0xc1 isn't a valid MsgPack header, but it was allowed by mp_check.
As a result, msgpack.decode crashed while trying to decode it.
This commit updates the msgpuck library to fix this issue.

Closes #7818

NO_DOC=bug fix

(cherry picked from commit ced405af)

Introduce helpers for each of our custom extension types.
The helpers will be used by mp_check() to validate extension contents
and make sure no malformed data is accepted by tarantool.

Closes #6857

NO_DOC=no user visible changes

(cherry picked from commit 5b47124a)

Msgpuck is a submodule for tarantool and is needed while packaging.
Moved function of mp_encode_str0() from mp_error.cc into a common
place is msgpuck.h.

Needed for packaging workflow in tarantool/tarantool:
tarantool/tarantool#6260

NO_DOC=no visible changes
NO_CHANGELOG=no visible changes

In the new version an API is added to be able to customize MP_EXT
serializer for mp_snprint() and mp_fprint() functions.

Part of #4719

Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Serge Petrenko <sergepetrenko@tarantool.org>
Reviewed-by: Nikita Pettik <korablev@tarantool.org>
Reviewed-by: Alexander Turenko <alexander.turenko@tarantool.org>

The ability to encode/decode ext types is added to msgpuck.
These types will be used for decimal encoding/decoding in tarantool.

Needed for #692

The msgpack dependency has been updated because the new version
introduces the new mp_stack class which we will use to parse
tuple without recursion when initializing the field map.

Needed for #1012

Malformed MessagePack can cause `int k` counter overflow
inside mp_check()/mp_next().

See https://github.com/tarantool/nginx_upstream_module/issues/79
See https://github.com/rtsisyk/msgpuck/issues/16
Closes #2540

See #1874

Add helpers to decode numbers and use them throughout the code.

* make fiber.test.lua stable
* make snapshot.test.lua stable
* return consistent error code (SystemError) from unrecoverable
  xlog errors

Fixes TALOS-2016-0254
Fixes CVE-2016-9036
Fixes #1991

Add mp_snprint() for debug output

Fix compilation warnings

- Fix code style
- Remove useless tnt_raise() from tuple_compare_field()
- Use mp_decode_strbinl() for bin/str comparison

* msgpack encoding with lua c api(call, insert, eval, ping)
* remove extra hash lookup in net.box
* review fixes for netbox-write
* rewrite all encoding fucntions using Lua/C
* replace channels with fiber.sleep()/fiber.wakeup()
* review fixes (remove an unnecessary include)

Remove fiob_open_flags, use "mode" consistently.

This commit completely changes the data format used by Tarantool.
A new binary serialization format called MsgPack (http://msgpack.org)
has been introduced to store tuples, keys, request members, etc.
MsgPack supports various data types and hierarchical structures. Since
tuple & keys format has been changed, the binary protocol is no more
compatible with 1.5 clients.

The list of major changes:

 * Add MsgPack library and unit tests as a submodule
 * Add Lua bindings for the library and unit tests for it
 * Update IPROTO to use MsgPack for all kinds of requests
 * Change struct tuple to use MsgPack Array instead of BER-encoded fields
 * Remove fixed offsets from tuples (cannot be supported by MsgPack)
 * Replace const char *key, key_part pairs with MsgPack Arrays
 * Rework comparators and indicies to support MsgPack'ed fields
 * Merge NUM and NUM64 types into the one single type (NUM)
 * Rewrite box_lua.cc functions to support MsgPack instead of BER
 * Rewrite tuple_update to support MsgPack instead of BER
 * Totaly remove varint32 functions from all modules
 * Rework lua_tofield and YAML encoder to properly support Lua tables
 * Modifie bootstrap files and system spaces to use the new format
 * Add MsgPack support to the test system via msgpack-python
 * Update tests to use proper data types and remove unneeded box.packs

Tarantool 1.6 is the world's first MsgPack-based database!