* gnu/packages/patchutils.scm (patchwork): Update to 3.0.4.
[propagated-inputs]: Use Django 3.2.

* gnu/packages/django.scm (python-djangorestframework): Define as deprecated
alias for ...
(python-django-rest-framework): ... this new variable.
(python-django-filter)[native-inputs]: Adjust accordingly.
* gnu/packages/mail.scm (python-hyperkitty)[propagated-inputs]: Likewise.
* gnu/packages/patchutils.scm (patchwork)[propagated-inputs]: Likewise.

This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.

This is a follow-up to commit db5646d957895944007c1bb44fcd998ea392f168, et.al.

* gnu/packages/patchutils.scm (patchwork)[arguments]: Adapt one more
site-packages call.

Commit cb72f9a773e0931ee3758c851d96007ded034e4c changed the semantics of
SITE-PACKAGES, but did not adjust all callers.

* gnu/packages/bioinformatics.scm (python-pyvcf)[arguments]: Adjust for
missing trailing slash.
* gnu/packages/maths.scm (nomad-optimizer)[arguments]: Likewise.
* gnu/packages/patchutils.scm (patchwork)[arguments]: Likewise.

* gnu/packages/patchutils.scm (patchutils): Update to 0.4.2.
[source]: Remove patch.
[inputs]: Add ‘python’.
[arguments]<#:phases>: Remove trailing #t.
* gnu/local.mk (dist_patch_DATA): Remove patch.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

 Conflicts:
	gnu/packages/bioinformatics.scm
	gnu/packages/chez.scm
	gnu/packages/docbook.scm
	gnu/packages/ebook.scm
	gnu/packages/gnome.scm
	gnu/packages/linux.scm
	gnu/packages/networking.scm
	gnu/packages/python-web.scm
	gnu/packages/python-xyz.scm
	gnu/packages/tex.scm
	gnu/packages/version-control.scm
	gnu/packages/xml.scm
	guix/build-system/dune.scm
	guix/build-system/go.scm
	guix/build-system/linux-module.scm
	guix/packages.scm

This fixes a somewhat cryptic error, that pops up when gtksourceview-3 has not
been installed or propagated by any other package.

* gnu/packages/patchutils.scm (meld)[#:phases]: Add ‘copy-styles’.