Conflicts:
	test/box/test_init.lua

Use check_symbol_exists(), not check_function_exists(),
to discover fdatasync(), since apparently on some BSD systems
the symbol is present in the library but not in the headers
(I hope not vice versa).

Don't use check_prototype_definition, since it's not available
in CMake 2.6.

Review fixes:

- New configuration variable 'replication_protocol'
is defined in the configuration file. The original patch
would hand-craft it into generated files.
- Simplified  numeric version id generation.
- Removed timeouts from new sio_* calls. They did't quite work,
especially with blocking sockits. Timeouts should at least use
select(), which updates wait time on exit..
- Removed include cfg/tarantool_box_cfg.h into recovery.cc, instead
passed around all arguments explicitly.
- Removed unused headers.
- reused handshake code in master and replica
- simplified handshake in replica fiber
- removed clutter
- touched here and there.

Conflicts:
	test/box/configuration.test

Conflicts:
	CMakeLists.txt

Conflicts:
	src/admin.cc
	src/admin.rl
	src/box/txn.cc
	src/lua/init.cc
	src/memcached.cc
	src/session.cc

Remove get_socket_addr(), use existing sockaddr_in
to save in the cookie.

Fixes gh-47.

Update test results to be more deterministic.

Conflicts:
	src/box/space.cc
	src/box/tuple.cc
	test/wal/oom.result

Tuples are got a big bigger with shared-arena patch (4 bytes
per tuple overhead).

So we exhaust the current arena in out-of-memory test a bit
faster than before.