The ' />' method of closing so-called 'void' tags is no longer required ...

...in HTML5, per #1215

I believe this covers everything. I basically did a find/replace on all SMF files with phpDesigner, then undid changes to a few places where we don't want the changes to be made (Wireless template and anything dealing with XML pretty much).

Signed-off-by: Michael Eshom <oldiesmann@oldiesmann.us>