Apply StrictNodes to hidden service directories early

Apply StrictNodes to hidden service directories early

Previously, we would sometimes decide in directory_get_from_hs_dir()
to connect to an excluded node, and then later in
directory_initiate_command_routerstatus_rend() notice that it was
excluded and strictnodes was set, and catch it as a stopgap.

Additionally, this patch preferentially tries to fetch from
non-excluded nodes even when StrictNodes is off.

Fix for bug #10722. Bugfix on 0.2.0.10-alpha (the v2 hidserv directory
system was introduced in e136f00ca). Reported by "mr-4".