more 3am centralauth crap woo

more 3am centralauth crap woo
* dump $wgCentralAuthState in favor of specific toggles for auto-migration and strict enforcement
* plan to improve that :P
* use new hook to add global id on preferences; will want mor edetail there and a fun link and stuff
* drop the funky https link option for now on the wiki list; think about redoing that later
* use paths on wikis where they're not totally plain so i can tell my links apart on my test box