[PATCH] hgweb: fixes broken URLs of RSS/Atom feeds (issue1772)

[Yuya Nishihara]

> # HG changeset patch
> # User Yuya Nishihara <yuya at tcha.org>
> # Date 1259681737 -32400
> # Node ID 259a5abc2a7288ca7db6ca4ca8edec2a30dd2b82
> # Parent  2e67734e1453e44de0816c3f562005e89c09c21f
> hgweb: fixes broken URLs of RSS/Atom feeds (issue1772)

Things to consider:

* This eliminates `http://host:port' even if you specified baseurl explicitly.
  Only `/path/part' is prepended.
* It makes the test case introduced by f6eb03027411 (issue1679) meaningless,
  because there's no `://'.

Is there a need to include `http://host:port' ?

Yuya