* Modified the timestamp key to use all parameters, otherwise various entries are sharing the same timestamp key and thus some of them can be served even though they are out of date. Consider the following case:
** Two requests for feeds sharing the same timestamp key are done
** Someone edits a page (or whatever else that change the recentchanges table)
** A user request one of the two feed above, the feed is correctly re-generated and the timestamp key changed
** A request for the other feed is done, this time the timestamp is the one of the request just above and the cached version will be served (even though it should not)
Based on a patch by Bawolff.
* Removed Crb from the credits since none of his code remains.
* Fixed two bugs which both broke feed links on RCL: $this->mTargetTitle not initialised when setTopText() is called, and $out->setFeedAppendQuery() in setBottomText() overridden by a subsequent call to setSyndicated(). Fixed both by rearranging data flow, using memoized accessors instead of setup functions to eliminate bugs due to execution order.
* Renamed a few variables which were unclear ($feed and $feedObj).
* Remove 2 unused globals
* (bug 17488) Link in toolbar to feeds should be localized (already have the feed-$format messages) Patch by Marcin Cieślak.
* Tangentially, can $wgFeedClasses be moved from Defines to DefaultSettings? Seems to make more sense in the latter.
