moving some hidden services function from routerlist.c to rendcommon.c

moving hid_serv_get_responsible_directories and hid_serv_acting_as_directory from routerlist.c to rendcommon.c

The changes are in: https://github.com/hsibyani/Tor/commit/596e0a3058bde9abf2386a648d6e3240e4635b8a

Trac:
Username: sibyani