Identify client-specific options that work with hidden services
Many of the "client-specific" options in the tor manual page work with Hidden Services.
Others, such as Socks/Trans/NATD/DNSPort, do not.
It would be great to split up the client-only section into those options that truly only work for clients, and those that also affect the behaviour of hidden services (and bridge relays, and relays, and authorities).
For example, when a bridge relay builds an anonymous 3-hop path to submit its descriptor, it is likely affected by all the client options that affect node selection. (Unless we specifically disable them for servers.)
And a hidden service's paths are affected by these same options.