Conflicts:
	doc/user/target.db

Fix broken xmllint validation.

An older version of xmllint failed to validate a broken
URL.

The URL led to nowhere, so this also fixes a few dangling
links.

Use olink & targetptr instead of link & linkend, as is the
convention in the rest of the manual.

Give internal links a bit longer names (as is also convention
in the rest of the manual).

Conflicts:
	.gitmodules

Conflicts:
	include/errcode.h
	test/big/lua.result
	test/big/lua.test
	test/box/lua_misc.result

The final version of odnoklassniki patch did not include the
most important part - delayed free of salloc memory.

Make a quick & dirty fix to the point.

Conflicts:
	test/box/lua_sandbox.result

Conflicts:
	test/box/configuration.result
	test/box/configuration.test

Conflicts:
	.gitmodules

Conflicts:
	src/tarantool.cc

Set signal handler for all signals, not just SIGTERM.
Print signal name to the log on exit.