Conflicts:
	client/tarantool/tc.c

Implement tuple validation when building a new index.
This introduces such checks as for field type, presence of a field,
etc. in all tuples added to the new index.

Add error code ER_INDEX_ARITY, update tests.

Add a check that the primary key is always unique.

Test unique -> non-unique transition.

Debug index:alter().
Add tests for changes in index id, name, type, unique/not unique.
Make box.space[i].index[j] output yaml-parsable (- idx: index 0
parsing problem).

Cover basics of CREATE INDEX.
Add support for index names.
Maintain index names in Lua.

Fix memory leaks this test has revealed.

2. delete setopt and delimiter contractions

 * 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)

 * 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)

https://blueprints.launchpad.net/tarantool/+spec/auto-init-storage

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

before starting another one.