files in a certain directory on _one_ of the hosts (-I and -X apply to all).
Perhaps -I and -X should take an optional hostname before the directory?
-* When simplifying paths, wget needs to stop at any '?' character.
+* When simplifying paths, wget needs to stop at any '?' character. Also, wget
+ behaves differently from popular browsers in removing './'s from abs. URLs.
* Add an option to not encode special characters like ' ' and '~' when saving
local files. Would be good to have a mode that encodes all special characters