how to submit patches

[Mike Carifio]

I'm making a few changes to qmtest 1.1.5 to allow for
start/stop/restart/status of qmtest gui on RH7.3 as a
daemon using /sbin/service. I'd like to submit a patch
back to codesourcery.com so they can bless it if it
passes muster. How should I do this? Here's my guess:

tar -zxf qm-1.1.5.tar.gz
cp -r qm-1.1.5 qm-1.1.5-carifio
cd qm-1.1.5-carifio
./configure --prefix=/usr/local/carifio
make; make install
# /usr/local/bin/qmtest is official 1.1.5
# /usr/local/carifio/bin/qmtest is my modified version

... make the changes, test the changes, be the changes ...

cd .. # qm-1.1.5 and qm-1.1.5-carifio are siblings
diff -u qm-1.1.5 qm-1.1.5-carifio > modifications.patch
mail -s "mods" somewhere at codesourcery.com < modifications.patch

If there's a better way to do this, now's a "teachable moment". Thanks.