- Remove old versions of Fedora and Ubuntu
- Add Fedora 26 and Fedora 27

Travis images are broken by design.

Closes #2069

Ubuntu Trusty on Travis is buggy.

Fixes #2752

Closes #2605

Use two decimal digits in fractional part of quota_used_ratio and
arena_used_ratio.

Closes #2082

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

iproto_init and port_init should not be called twice, regression
after 1aba8acf. Fixed #2235.

Now modules can push tuples onto Lua stack and get them from the stack.

Fixes #1878

Null-merge changes from 1.5.

Fix work with int64_t in lua-cjson.c

Split evio service start to separate functions bind and listen. Remove
rebind logic from evio_service and on_bind callback and implement in
iproto logic. Do listen after box recovery.

* Switch to PackPack for packages
* Use `packagecloud` deployment for packages instead of travis.sh script
* Use `script` deployment for sources instead of travis.sh script
* Package all branches, but upload only 1.6/1.7
* Move all Travis CI script into the single Makefile

extra/rpm are mot used anymore.

Sophia was an experimental storage engine in 1.6.x.
Please use 'vinyl' engine in Tarantool 1.7 instead.

Closes #2040

Closes #2030

See #1874

Jenkinsfile is a script, akin to .travis.yml that contains
instructions how to build code in the repo. I'm experimenting
to see if we can implement a similar workflow to what we have
on travis.ci

Totally disable /usr/lib/rpm/brp-strip-* scripts on all
versions of rpmbuild.

Fixes #1901

* Don't start tarantool on install
* Don't restart tarantool on upgrade

Fix #2053

This patch doesn't change public C API.

See #1878

Fixes #1849

Fixes TALOS-2016-0255
Fixes CVE-2016-9037
Fixes #1992

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