5.4.4

* Regular Board:
* (addition) regular URLs now accepted in URL, validated with
FILTER_VALIDATE_URL beforehand (for all types)
* (addition) userposts="10" / how many of the users latest posts to show
(default is 10).  Set to "0" to disable recent user posts altogether.
* (addition) sfw=""/nsfw="" / designate a comma separated list of boards
(by shortname) that are explicitly sfw/nsfw.
* (addition) boardrules="" / URL to a page that houses all of the rules
for your boards.  (default is blank).
* (addition) boardform="" / boardposts="" / left or right.  Floats the
individual elements to the left or right. (defaults:
boardform="left",boardposts="right")
* (addition) clear="1/0" / whether or not to clear the form and board
content and have them take up the width of the div.  default is 0 (they
will be floated, taking up only 45% of the div).  Will override
left/right if set to 1 (for obvious reasons).
* (change) if board is preset to display only a single board, showboards
will be disabled (since we're only showing one board with the shortcode,
board links are now useless, so we won't show them).
* (update) fewer database calls
* (update) when viewing board front pages, and 'click to load' button is
pressed (to load more replies inline), button is hidden after being
pressed.