Libmonkey: Add accepted_connections to mklib_worker_info

Signed-off-by: Vladimir Cernov <gg.kaspersky@gmail.com>
Libmonkey: Fix warning in md5_check.h

Signed-off-by: Vladimir Cernov <gg.kaspersky@gmail.com>
Libmonkey: Add new test for worker info

Signed-off-by: Vladimir Cernov <gg.kaspersky@gmail.com>