URLs mentioned in the list. I figure -O or something would have to be
implied by such an action.
+ * Make curl with multiple URLs, even outside of {}-letters. I could also
+ imagine an optional fork()ed system that downloads each URL in its own
+ thread. It should of course have a maximum amount of simultaneous fork()s.
+
* Improve the regular progress meter with --continue is used. It should be
noticable when there's a resume going on.