Patch to implement
Special:Recentchangeslinked makes awkward wikilinks and does not match the standard text in the toolbox, "Related Changes". However, it is easy to add an alias for Special:RelatedChanges and this minor change is unlikely to break anything in the future.
A short discussion was (2008-02-19 to 2008-02-22) at:
I include a patch that does this. It alters the english localization to add the alias. According to the documentation, this should also provide the alias to most languages as well, using fallback. I have tested the patch on svn-current r31195 (2008-02-22 11:20:15 -0500).