Bug 2960: Inserting an URL cause latex/pdflatex failure

[Helge Hafting]

More lyx-1.5svn testing:

Insert a URL into the document, fill in the URL field with
http://www.free-firewall.org

Try view->pdflatex or view->latex,
get the error message
"Undefined control sequence" \url{http://www.free-firewall.org}