Log message:
es: remove Interix support

Log message:
shells/es: configury fixes
Instead of patching in an increasingly long list of OSes to avoid
redefining <stdlib.h> functions on, just use #if 0. Should fix the
Solaris build.
While here, don't hardcode the traditional wait status encoding; it's
no longer necessary to work around union wait and baking it in
violates portability rules.
PKGREVISION -> 5

Log message:
shells: Replace RMD160 checksums with BLAKE2s checksums
All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
shells: Remove SHA1 hashes for distfiles

Log message:
shells/es: Install manpages into ${PKGMANDIR}.
Modify the Makefile patch to install manpages under
"${PREFIX}/${PKGMANDIR}" instead of "${PREFIX}/man".

Log message:
Add SHA512 digests for distfiles for shells category
Existing SHA1 digests verified, all found to be the same on the
machine holding the existing distfiles (morden).  Existing SHA1
digests retained for now as an audit trail.

Log message:
"user-destdir" is default these days

Log message:
Bump PKGREVISION to reflect the recent change in pkginstall/shells to use
etcutils to update /etc/shells.