- implement support for space names
- add space invalidation to Lua
- implement create_space, create_index helper functions.

What happened in production, during upgrade:
- logger option in the config file was pointing to nowhere
- the server would start, unable to check that the child logger
process died prematurely
- the server would fork spawner process to spawn replication relays
- a replica would come in, asking for data
- the spawner would successfully spawn a relay but die on SIGPIPE
when trying to write to the log (a pipe leading nowhere by now)
about the event
-> we have a master with a dead spawner process, no more replicas,
sorry.

Well, someone should check their configuraiton in the first place.
Nevertheless, try to be nice, and:

- don't die on SIGPIPE in the spawner process.
- when starting the logger, make an effort to check that it has started
successfully. There is no reliable way to find this out, so do
it with the best effort.

Inline tuple_field_old(), which avoids a function call
for field 0 access.

The bootstrap snap (000000000000000001.snap) moved to src/.
It was removed from test/box/. Fix the install target,
add a RENAME option to correctly install the file.

Conflicts:
	test/box/cjson.result
	test/box/cjson.test.lua

Conflicts:
	test/box/suite.ini

Add comment.
Fix style.
Update tests.

for proper yaml null output. Fix test/box/socket test.

a binary stream. Fix box/cjson test.

Continue pruning memcached.

Conflicts:
	test/box/lua.result
	test/box/lua_misc.result

Remove memcached support in 1.6.
We're about to change the type system.
About to add authentication.
This all makes supporting memcache within the core too cumbersome.

Fix confetti error output. Remove redundant cfg_reload(). Make sure we
produce a Lua error on error.
Remove duplicate code.
Style renames.