* replace use of deprecated makeKnownLinkObj() by linkKnown() in core special pages

* replace use of deprecated makeKnownLinkObj() by linkKnown() in core special pages
* use array type parameter instead of string to escapeLocalUrl(), getFullURL() and getFullUrl() for readability
* some code readability and indentation improvements

Linking this to r51559 for CodeReview as there is some discussion there, and these changes are very similar.