Changes made for the client to work with the "develop" branch of rtrlib.
 - rtr_mgr_init now malloc's a struct rtr_mgr_config, thus rtr_create_mgr_config() is not needed anymore.
 - rtr_mgr_free now free's the rtr_mgr_config struct and also memory inside the sockets, thus some juggling is
needed to cleanup memory without segfaults.
 - SSH support broken
Merge branch 'develop' of https://github.com/rtrlib/bird-rtrlib-cli into develop