* sys/prctl.h can be found only on Linux, but cmake recognizes Debian/kFreeBSD
 as Linux.
 * extern "C" for TIMEOUT_INFINITY (it is used in plugins)

Add basic tests for space DDL, fix bugs the test coverage
has revealed.

Conflicts:
	test/box/net.box.result

Fix race condition in session.test.

Modify 'space' object contents when altering it, rather
than create a new Lua table.
In Lua, when saving a copy of a table in a local variable
a shallow copy is saved, in other words, table variables
initialized from each other share state.

Make use of this feature in the following scenario:

space = box.schema.create_space()
space:create_index() -- modifies box.space[id] which 'space' is a
shared ptr to
space.index[0] - great, space.index[0] has the added index.

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

Fix session and bad_trigger test
Fix output (remove garbage, fix whe interrupted by exceptions)
Add list of broken tests when tests are run with "./test-run.py --force" flag (make test-force)

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.