Handle URIs in internal link text
Handle URIs in internal link text

A URI in the link text part of an internal link is invalid, so roll it
back. (Note that external links are differnt: there there is no harm in
allowig URIs in the link text. It is only a problem in the internal link
case because it could confuse the routing if we allowed URI characters
in article titles.)

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

geni/wikitext,barnaclebarnes/wikitext,geni/wikitext,geni/wikitext,wincent/wikitext,wincent/wikitext,barnaclebarnes/wikitext,barnaclebarnes/wikitext