* gnu/packages/patches/quilt-test-fix-regex.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/patchutils.scm (quilt)[version]: Upgrade to 0.65.
[source]: Use patch.
[arguments]: Adjust 'patch-tests' phase for new tests. Re-enable "mail"
test.
Eric Bavier