* replace some use of deprecated makeKnownLinkObj() by link() in core

* replace some use of deprecated makeKnownLinkObj() by link() in core
* use array type parameter instead of string to escapeLocalUrl(), getFullURL() and getFullUrl() for readability
* add FIXME in Parser.php and LogEventsList.php where I didn't know how to replace makeKnownLinkObj by link()
* return type for private method Skin::editUrlOptions() changed from string to array
* some code readability improvements

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

Todo: core special pages