fix for 2279 causes addresses mapped to private addresses to fail
As part of the fix to #2279 (moved) we committed 411ec3c0 which made tor refuse socks connections to private/local addresses if .exit isn't specified.
I just got this line in my tor log: Mar 31 14:45:52.116 [Warning] Rejecting SOCKS request for anonymous connection to private address [scrubbed]
I believe it happened because some exit relay answered my pidgin's request for the aim server with 192.168.1.1 or the like, and then my Tor cached that address even though it would map requests to it in the future and then refuse them.
I guess that means we should either revert that part of 2279 or add a check when we're adding an addressmap.