Log message:
mail: Replace RMD160 checksums with BLAKE2s checksums

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

The following distfiles were unfetchable (possibly fetched
conditionally?):

./mail/qmail/distinfo netqmail-1.05-TAI-leapsecs.patch

Log message:
mail: Remove SHA1 hashes for distfiles

Log message:
mail/elm: Install manpages into ${PKGMANDIR}.

This project uses a Perl-style Configure script that can use a
custom config.sh to provide default answers to questions that it
asks as part of the configuration process.  Modify the custom
${FILESDIR}/config.sh to allow substituting for @PKGMANDIR@ in the
default location for unformatted manpages.

Log message:
Use REAL_ROOT_USER/REAL_ROOT_GROUP instead of ROOT_USER/ROOT_GROUP
for all pkgsrc dir/file ownership rules. Fixes unprivileged
user/group names from leaking into binary packages, manifest as
non-fatal chown/chgrp failure messages at pkg_add time.

Bump respective packages' PKGREVISION.

Log message:
Use OPSYSVARS.

Log message:
Add SHA512 digests for distfiles for mail category

Problems found locating distfiles:
	Package mutt: missing distfile patch-1.5.24.rr.compressed.gz
	Package p5-Email-Valid: missing distfile Email-Valid-1.198.tar.gz
	Package pine: missing distfile fancy.patch.gz
	Package postgrey: missing distfile targrey-0.31-postgrey-1.34.patch
	Package qmail: missing distfile badrcptto.patch
	Package qmail: missing distfile outgoingip.patch
	Package qmail: missing distfile qmail-1.03-realrcptto-2006.12.10.patch
	Package qmail: missing distfile qmail-smtpd-viruscan-1.3.patch
	Package thunderbird24: missing distfile enigmail-1.7.2.tar.gz
	Package thunderbird31: missing distfile enigmail-1.7.2.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:
Fix return types.

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

Log message:
Grammar fix.

Log message:
Solve build problem under NetBSD 6.0 and newer differently by simply
not installing the formatted manual pages in general. They are of
limited use anyway.