(rationale by Purodha) To some extent at least, category pages, and media pages,...

(rationale by Purodha) To some extent at least, category pages, and media pages, can now be subjects, or targets, of redirects, protections, and renames. Messages that potentially link to one of those with wikicode [[$N]] ought to be altered to now use [[:$N]], which unlike the other, always correctly links to all pages in all namespaces. Some messages have been adapted recently. Fixing the remaining candidates in MediaWiki code:
* autoredircomment
* redirectingto
* import-logentry-upload
* protectedarticle
* unprotectedarticle
* modifiedarticleprotection
* delete and move text
* 1movedto2
* 1movedto2 redir