Log message:
python: egg.mk: add USE_PKG_RESOURCES flag

This flag should be set for packages that import pkg_resources
and thus need setuptools after the build step.

Set this flag for packages that need it and bump PKGREVISION.

Log message:
*: bump PKGREVISION for egg.mk users

They now have a tool dependency on py-setuptools instead of a DEPENDS

Log message:
graphics: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
graphics: Remove SHA1 hashes for distfiles

Log message:
Use Pillow as versioned dependency

Log message:
*: Remove manual page entries from ALTERNATIVES files.

Thes are not supported by pkg_alternatives, and lead to breakage as found
in <http://mail-index.netbsd.org/tech-pkg/2020/05/06/msg023089.html>.

In many cases these were unnecessary anyway, as they match the corresponding
command that pkg_alternatives will have automatically detected manual page
entries for, plus many of them did not support PKGMANDIR.

In the one case (databases/py-peewee) where the manual page does not match
the command name, pkg_alternatives will need to be enhanced to support this
before it can be re-enabled.

Log message:
py-qrcode: updated to 6.1

6.1:
- Fix short chunks of data not being optimized to the correct mode.
- Tests fixed for Python 3

Log message:
py-qrcode: updated to 6.0

6.0:
- Fix optimize length being ignored in QRCode.add_data.
- Better calculation of the best mask pattern and related optimizations.

Log message:
*: Move SUBST_STAGE from post-patch to pre-configure

Performing substitutions during post-patch breaks tools such as mkpatches,
making it very difficult to regenerate correct patches after making changes,
and often leading to substituted string replacements being committed.

Log message:
Cleaned up PLIST files.

The actual cleanup has been done by pkglint:
* Added missing identifier comments
* Replaced ${PKGMANDIR} with a simple man, since the infrastructure does
  all the magic for PLISTs