Conflicts:
	src/box/lua/call.cc
	src/lua/init.cc
	test/box/net.box.result
	test/box/net.box.test.lua

Conflicts:
	doc/www-data.in/download.cmake

This patch also fixed bug with schema parsing in port_uri.rl

See #347

(Crash on rename index).

Do not invalidate a reference to key_def in alter space,
when preserving the old index.

Instead, update the old key def with new parameters.

See #347

See #347

Conflicts:
	doc/www-data.in/download.cmake

Conflicts:
	cmake/rpm.cmake
	extra/rpm/tarantool-scl.rpm.spec
	extra/rpm/tarantool.rpm.spec.in