object.h was an Objective C legacy providing nothing, mostly, and with some
changes to class hierarchies I have in mind using it will introduce multiple
inheritance, which I'd rather avoid.

Extract bsdsocket_io_wait() from bsdsocket.cc to public C API.
This very simple patch allow to use Tarantool event machine in
stored C procedures.

Other changes: replace fiber_wakeup() with fiber_call() here to save extra
               event loop iteration.

A prerequisite for #1062: Automatic cluster bootstrap

Updated libeio invokes done_poll callback but we weren't providing one.

Support the following configuration:

    box.cfg {
        replication_source = {
            "uri1";
            "uri2";
            "uri3";
            -- ...
        }
    }

This change is backward-compatible: old syntax is supported as well.
box.info.replication is not changed and displays state of the first
(if sort by URI) master.

This patch also adds a simple hack to automatically detect the first
master (if sorted by URI) during initial cluster bootstrap by
comparing box.cfg.listen uri with replication_source uris.

Remove broadcast(): it din't work as expected and wasn't used
by anyone.

Update error messages.
Follow the coding style in C function naming.

Added lots of checks and nice error messages.
Added lots of tests

Disallow upsert in presence of a unique secondary key.

Update tests.
Fix typos.

No semantical code changes.
struct replica will be used for applier + relay structure.

Save received server_id and vclock to struct replica.

Remove unneeded C++ usage. This patch is needed to combine struct replica
and struct relay.

We already install signal handlers, but don't give them a chance
to execute, since don't yield during recovery. Add yields once
per a few tens of thousands of events.

Deploy a special hack with an idle watcher to make sure that
fiber_sleep(0) doesn't sleep for too long (1 ms without this
watcher).

libev sleeps for at least 1 ms (backend_mintime) unless there are
idle watchers. The logic of this behaviour is obscure to say the
least.

Since the upstream is also using *screw-the-community* cvs for
revision control, maintaining an own patch set on top of the
upstream is also a pain in the neck.

So, instead of patching libev (I hesitate to simply remove the
obscure logic since I don't understand the reason for it from the
comments, and I don't think making this logic optional is worth
the hassle, given also that we will diverge even more from the
upstream), create an idle watcher in fiber_sleep(), as a
workaround, to make sure backend_mintime is not looked at when
calculating sleep time for poll(), and zero timeout is used
instead.

 * Update iproto.cc to use greeting_encode()
 * Update replica.cc and net.box to use greeting_decode()
 * Add a parsed remote version to net.box and struct replica
 * Remove duplicate code

Protocol change:

 * During binary protocol handshake sent
    "Tarantool 1.6.7-83-gc6b2129 (Binary)" instead of
    "Tarantool 1.6.7-83-gc6b2129              @custom_proc_title"
   This change is backward-compatible up to 1.6.1.

* rename 'time' to 'clock'
* remove time.bench64, I can't think of a use case

Regression by 0b17f366

Explicitly close net.box connection on error.

Partially reverts squashed 316d4e3a

This regression introducing during replacing port_ffi with port_buf
by 2fcce449

Correct return value of ipc_channel_put(), since
it may return an error if the channel is closed.

Make get/put functions inline.

Remove a public declaration for ipc_channel_is_readonly() (towards
removing the concept of readonly altogether).

after review fix: remove group name param in config.

gh-918 tarantoolctl group support implemented with default user group