Log message:
misc: Replace RMD160 checksums with BLAKE2s checksums

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

The following distfiles could not be fetched (possibly fetched
conditionally?):

./misc/libreoffice/distinfo libreoffice/harfbuzz-2.6.4.tar.xz

Log message:
misc: Remove SHA1 hashes for distfiles

Log message:
Comment out dead sites (DNS problems).

Log message:
Add SHA512 digests for distfiles for misc category

Problems found locating distfiles:
	Package colorls: missing distfile ls.tar.gz
	Package molden: missing distfile molden-4.6/molden4.6.tar.gz
	Package softmaker-office-demo: missing distfile ofl06trial.tgz

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:
Allow misc/libutf to be cross-built - the build target is just its library,
and the test target is only used for testing

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

Log message:
catch up with newer libtool which now demands a --tag=CC

Log message:
Remove @dirrm entries from PLISTs

Log message:
update master site.

Log message:
Simply and speed up buildlink3.mk files and processing.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.