Support Debian's upcoming xulrunner-1.9.1 packages
The conkeror Debian package now works with the upcoming experimental
xulrunner-1.9.1 packages (see http://glandium.org/blog/?p=370) in
Debian, too.
Since conkeror still throws much more warnings with xulrunner 1.9.1
than with 1.9.0.x, for now the package currently prefers 1.9.0.x over
1.9.1 if both are installed.
Call "xulrunner-1.9.1 /usr/share/conkeror/application.ini" if you have
xulrunner-1.9 and xulrunner-1.9.1 installed and want to checkout
conkeror in combination with xulrunner 1.9.1.