This package is using the quilt framework.
All patches are located in debian/patches.

Adding a new patch: quilt new <date-patch_name>
This will create a new file debian/patches/patch/date-patch_name.
Please use the current date (e.g. 20100221 - YYYYMMDD) as prefix!

Editing a file to include it into the patch: quilt edit <filename>
This will open your $EDITOR.

To write your changes into the new patchfile: quilt refresh.

quilt push:
Apply patch(es) from the series file.  Without options, the next
patch in the series file is applied.  When a number is specified,
apply the specified number of patches.  When a patch name is
specified, apply all patches up to and including the specified patch.
Patch names may include the patches/ prefix, which means that
filename completion can be used.

quilt pop:
Remove patch(es) from the stack of applied patches.  Without options,
the topmost patch is removed.  When a number is specified, remove the
specified number of patches.  When a patch name is specified, remove
patches until the specified patch end up on top of the stack.
Patch names may include the patches/ prefix, which means that
filename completion can be used.