fix unused variable
fix warning ('rc' may be used uninitialized in this function)
fix warning ('port' may be used uninitialized in this function)
fix warning ('ret' may be used uninitialized in this function)
Add libiberty-dev for debian.
Minor style fixes: fix-warnings branch.
Merge branch 'fix-warnings-stable' into stable
Merge remote-tracking branch 'origin/stable'

Conflicts:
	client/tarantool/tc_cli.c