Make all the digestmaps inside routerlist_t use the new typechecking wrappers, so we can catch any more bugs like the one fixed by 10561.  This turned up a bug in routerlist_remove: we were extracting a routerinfo_t from desc_digest_map.  Fix that too, though it was probably harmless, since we were only doing a pointer comparison with it.


svn:r10563