Log message:
Mass-change BUILD_DEPENDS to TOOL_DEPENDS outside mk/.

Almost all uses, if not all of them, are wrong, according to the
semantics of BUILD_DEPENDS (packages built for target available for
use _by_ tools at build-time) and TOOL_DEPEPNDS (packages built for
host available for use _as_ tools at build-time).

No change to BUILD_DEPENDS as used correctly inside buildlink3.

As proposed on tech-pkg:
https://mail-index.netbsd.org/tech-pkg/2023/06/03/msg027632.html

Log message:
time: Replace RMD160 checksums with BLAKE2s checksums

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

Log message:
time: Remove SHA1 hashes for distfiles

Log message:
time: align variable assignments

pkglint -Wall -F --only aligned -r

No manual corrections.

Log message:
all: replace SUBST_SED with the simpler SUBST_VARS

pkglint -Wall -r --only "substitution command" -F

With manual review and indentation fixes since pkglint doesn't get that
part correct in every case.

Log message:
Comment out some dead HOMEPAGEs.

Log message:
Add SHA512 digests for distfiles for time category

Problems found with mismatching existing digests for:
	distfiles/asclock-classic-1.0.tar.gz
	distfiles/asclock-gtk-2.1.10beta.tar.gz
	distfiles/asclock-xlib-2.0.11.tar.gz
	distfiles/emiclock-2.0.2.tar.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
Remove USE_X11BASE and X11PREFIX.

Log message:
"Use of DOWNLOADED_DISTFILE is deprecated. Use the shell variable
$$extract_file instead."

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