Log message:
py-Tk: disable for Python 3.12

tk will not be a default dependency of the batteries-included Python packages,
and srcdist.mk needs to be switched from distutils to some other method of
installing the modules separately. Until this is done, there is no py-Tk
for Python 3.12.

Log message:
*: use PYTHON_VERSION instead of _PYTHON_VERSION

Log message:
Always extract the full Python distfile for modules.

This retires an old "optimisation" that over time has created more
problems than it solved, including various questions from users about
the ignored patch failures.

Log message:
devel/py-*: align variable assignments

pkglint -Wall -F --only aligned --only indent -r

No manual corrections.

Log message:
Follow some redirects.

Log message:
Remove unnecessary PLIST_SUBST and FILES_SUBST that are now provided
by the infrastructure.

Mark a couple more packages as not ready for python-3.x.

Log message:
Use ${PY_DISTVERSION} in PKGNAME instead of 0.
Noted by mef on pkgsrc-users.

Log message:
No need to have two variables for the same logic.
Replace PYTHON_PATCH_SCRIPTS with REPLACE_PYTHON.

Log message:
Mark packages as not ready for python-3.x where applicable;
either because they themselves are not ready or because a
dependency isn't. This is annotated by
PYTHON_VERSIONS_INCOMPATIBLE=  33 # not yet ported as of x.y.z
or
PYTHON_VERSIONS_INCOMPATIBLE=  33 # py-foo, py-bar
respectively, please use the same style for other packages,
and check during updates.

Use versioned_dependencies.mk where applicable.
Use REPLACE_PYTHON instead of handcoded alternatives, where applicable.
Reorder Makefile sections into standard order, where applicable.

Remove PYTHON_VERSIONS_INCLUDE_3X lines since that will be default
with the next commit.

Whitespace cleanups and other nits corrected, where necessary.

Log message:
Drop superfluous PKG_DESTDIR_SUPPORT, "user-destdir" is default these days.