* remove obsolete comments from recovery.cc
* update example lua

Remove libbfd from dependencies and use libunwind for stack traces.

Closes #2103

LuaRocks requires openssl and curl in order to download
manifest from rocks.tarantool.org.

Fixes #2612

Usage:

    tarantoolctl rocks install ROCK - install a rock
    tarantoolctl rocks remove ROCK - remove a rock
    tarantoolctl rocks show ROCK - show information about an installed rock
    tarantoolctl rocks search PATTERN - search repository for rocks
    tarantoolctl rocks list - list all installed rocks

There are no other commands, options, configuration files. Our official
repository (http://rocks.tarantool.org) works out of the box. All rocks
are installed to ${PWD}/.rocks directory to support separate rocks trees
per project, as proposed by #2067. Rockspec can use "tarantool >= 1.7.x"
inside dependencies = {} block to depend on a specific Tarantool version.

LuaRocks has been slightly hacked to support custom configuration
via site_config.lua. There are no other changes in the upstream code.
It is not a fork and it isn't going to be a fork. All formats, layouts
and rockspecs are 100% compatible with the upstream LuaRocks 2017-07-10.

This feature intentionally doesn't have CMake option to disable it,
because it should be provided on all available platforms out of the box.

Other changes:

 * Add ${PWD}/.rocks to default package.path/package.cpath
 * Hack tarantoolctl to display subcommands in --help.
   Currently command line arguments handling are not perfect, but
   it can be fixed only by a new argparse implementation.

Closes #2067

Inpspired by tarantool/curl module by Vasiliy Soshnikov.
Reviewed and refactored by Roman Tsisyk.

Closes #2083

Original behavior can be enable with `./test-run -j -1`

See https://github.com/tarantool/test-run/issues/56

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

Closes #2040

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

Packaging tools are picky.

Ancient Red Hell 6 doesn't support Recommends.

Use strong dependency on `netbase` for Debian and weak dependencies on
/etc/protocols and /etc/services files for RPM.

Thanks to Ivan Kosenko

Closes #1794

Closes Debian/#835798 (FTBFS).

* Use our own fork
* Fix typo in CMakeLists.txt
* Update build dependecies in README.md
* Fix a potential bug with buffer size calculation in ss_lz4filter_next()

Content was integrated to the main documentation by
8d0b9761

http://tarantool.org/doc/book/administration.html

Create /usr/lib*/tarantool and /usr/share/tarantool from tarantool package

CentOS 6 doesn't have proper version of python-gevent

See #1293

* Fix hardening if backtraces are off
* Ensure that all tests are passed with hardened flags
* RPM: add --with/--without backtrace option (default is --with)
* RPM: remove dependency on libbfd, libiberty, libz if --without backtrace
* RPM: enable stripping and debuginfo if --without backtrace

Backtraces are still enabled by default.

Hardened flags used by RedHat:

  -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
  -fstack-protector-strong --param=ssp-buffer-size=4
  -pie -fPIC

xxx-common packages is Debian style.
RPM usually doesn't use separate packages for init scripts.

See comments in gh-1120

https://bugzilla.redhat.com/show_bug.cgi?id=1301720

A prerequisite for proper #1085 fix

This patch also enables daemon supervision when used with systemd.
A prerequisite for Fedora/EPEL7 packages.

See https://github.com/tarantool/build/issues/10

Switch tarantool builds to a new RPM spec

Source was unpacked incorrectly.

Changelog:

- Change naming scheme to include a postrelease number to Version
- Fix arch-specific paths in tarantool-common
- Rename tarantool-dev to tarantool-devel
- Use system libyaml
- Remove Vendor
- Remove SCL support
- Remove devtoolkit support
- Remove Lua scripts
- Remove quotes from %files
- Disable hardening to fix backtraces
- Fix permissions for tarantoolctl directories
- Comply with http://fedoraproject.org/wiki/Packaging:DistTag
- Comply with http://fedoraproject.org/wiki/Packaging:LicensingGuidelines
- Comply with http://fedoraproject.org/wiki/Packaging:Tmpfiles.d
- Comply with the policy for log files
- Comply with the policy for man pages
- Other changes according to #1293100 review

This spec file was carefully reviewed by Fedora package maintainers
to comply with policies and packaging guidelines [1]. Please don't push
to this file before getting a review from somebody who is familiar with
these guidelines. Remember to update a changelog inside of the spec file.
"Policy is your friend. Trust the Policy. Love the Policy. Obey the Policy."
                                                            (c) debian.org

[1]: https://fedoraproject.org/wiki/Packaging:Guidelines

I've checked that packages actually work on Fedora Rawhide (systemd) and
CentOS 6 (sysvinit). It should be safe to switch our builds to the new
spec and remove old one after fixing problems with tarantool/build [2][3].

[2]: https://github.com/tarantool/build/issues/6
[3]: https://github.com/tarantool/build/issues/9