hs-v3: Clean cached descriptor(s) on ONION_CLIENT_AUTH_REMOVE
When a client authorization is removed with the control command ONION_CLIENT_AUTH_REMOVE
, we should also remove the associated descriptor from the cache else the .onion is still accessible even though the credentials have been removed.
Found by mcs/brade/acat during testing: https://trac.torproject.org/projects/tor/ticket/19757#comment:31