Revert "fix indention of RSS patch"

This reverts commit a010fc32a9c11bfbe8a82ad55fdec134d2476306.
Revert "Exclude hidden pages (config["hidepages"]) from RSS feed (see https://www.dokuwiki.org/config:hidepages)"

This reverts commit f5151bdbf999043dfe1ba73a684d37b27ff6e021.
Fix RSS namespace listings containing hidden pages
Merge pull request #464 from splitbrain/hidden_rss

Properly fix RSS namespace listings containing hidden pages FS#2891