large diff for www/firefox, please test

[Tobias Nygren <tnn%NetBSD.org@localhost>]

Hi everyone,

If you use www/firefox from pkgsrc-current, please test this diff.
It converts firefox to depend on devel/xulrunner and removes almost
all duplicated patches. DragonFlyBSD users in particular should test
this to make sure I didn't break anything.

To test:
# cd www/firefox
# ftp -a http://mx1.nygren.pp.se/misc/firefox-xul-20090913.diff.txt
# patch -p0 < firefox-xul-20090913.diff.txt
# make replace

If that worked, make sure the browser can be launched reliably
both through the stub and with xulrunner:

/usr/pkg/bin/firefox
^C
/usr/pkg/bin/xulrunner --app /usr/pkg/lib/firefox/application.ini

If no major regressions are found in two days, I will commit it.

Thank you,
-Tobias