Wiki tags? Also, tag [*]'s description is "undefined"

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Wiki tags? Also, tag [*]'s description is "undefined"
by Myask on 2015-04-15 (#145423)
Do we have tags specially for linking to {NESdev's wiki|wikipedia} in shortform à la [wiki="NES2.0"]The new NES 2.0 file specification[/wiki] leading to http://wiki.nesdev.com/w/index.php/NES_2.0? This seems like it would be useful (though wikipedia less so).

Also, the description appearing between the buttons that insert tags and the actual text entry box for the tag [*] is "undefined".