Merge debian infrastructure into stable.
Cleanup stable branch.
Fix bug: 'When server unexpectedly goes down Testing system waits while pid-file is deleted, but he wont'
fixing broken version of find_tests. remove commented code
Suppress writing ECONNRESET to the log, this typically happens on client timeout.
Merge branch 'stable'
Fix ./test-run --valgrind. Remove extra nesting of multi-return.
Merge remote-tracking branch 'origin/tt-pattern-fix-v2'
Merge remote-tracking branch 'origin/tt-segfault-fox'
Fix for connection timeout in --gdb
Merge remote-tracking branch 'origin/tt-gdb-fix'
Merge branch 'lua-plus-dict' of github.com:tarantool/tarantool into lua-plus-dict
Merge remote-tracking branch 'origin/master' into lua-plus-dict
Remove a piece of dead code.

Remove a piece of dead code which made select_range() and
select_reverse_range() extremely inefficient (a new iterator
instance for each tuple) and confusing.

box.index.iterator() creates a closure which is sufficient
to produce all iteration results. Use of index:next()
was apparently left by some tricky merge.
Merge branch 'stable'
Merge remote-tracking branch 'origin/master' into lua-plus-dict

Conflicts:
	src/box/lua/box.lua
Convert 'wal' suite to Lua, lua-console, dict-v6.