Test_suite restart disabled
Legacy tests moved to separated suite

No need to use filesystem notifications to discover updates to WAL when
the party writing the WAL is ourselves (the same process).

Wal writer updated to provide a notification mechanism based on
ev_async, replication relays subscribe to it.

Log messages should be emited in extended format after box.cfg even to
stderr.

Change the code to use small/rlist.h, to avoid code duplication.
small is self-contained.

Now that util.c is linked with libcore, split out
backtrace.cc from it. backtrace.cc depens on libbfd, and
we'd like the core to be standalone.

Doing box.cfg{background=true, logger='/EACCESS.log'} resulted in a
silent failure because initialization routine closed stderr first before
initializing the logger.

Changing stuff to absolutize pathes (logger, pid_file) to make it easier
to troubleshoot errors.

Things in say.c (logger guts) were changed to call exit instead of _exit
on failure in order for the cleanup to be performed.

Also adding a library for managing pid files under
third_party/libutil_freebsd.

Provide a default instance in the installation script, but don't
start it.

Now that we have a very nice title, don't use a custom proc title that
often.

Follow up fixes.
Signature changes for txn_commit_stmt(), move the check
for secondary keys to be engine-agnostic.

*)also fixed delete via secondary key
*)moved xlog creation from txn_begin_stmt to txn_commit_stmt

Do not override logger: tarantoolctl picks sensible defaults.

Remove custom proc title: script name is now included in the proctitle
automatically.

tarantool script.lua <status>: custom proc title

Accept MP_STR *and* MP_BIN as type for authentication scramble key
in IPROTO_AUTH packet.
Some codecs automatically pack non-utf-8 strings as MP_BIN. A scramble
is just an octect stream, so can (by chance) be both a utf-8 stream
and a binary stream, depending on the random seed.

Conflicts:
	doc/sphinx/reference/fiber-ipc.rst

Conflicts:
	doc/sphinx/book/box/triggers.rst

proctitle.c: since it's now fully rewritten by us, move from third_party
process_title.c: rename to title.c

Style changes.

 * Show instance name instead of 'tarantoolctl';
 * instance can set custom proc title on its own discretion.

 * add proctitle.h;
 * add config-time detection of setproctitle() syscall;
 * fixing program_invocation_(short)?_name globals (glibc);
 * fixing progname (getprogname(), initialized with argv[0]);
 * this module now works on osx;
 * fix osx ps displaying garbage (argc-1 extra \0 necessary);
 * general refactoring;
 * fix linux proctitle truncation (init_set_proctitle was called with
   argv+1, this is wrong);

 * CAVEAT: 'progname: ' prefix no longer present, will fix later