Log message:
rc: fix CONFIGURE_ARGS for readline option
From Periklis Akritidis on tech-pkg.

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:
Update rc to 1.7.4, also fixing a really old CVE in the process.
2002-07-25
  Bug: fix globbing of broken symlinks.
2002-07-31
  Bug: readline doesn't handle EIO either.
2002-08-15
  Bug: variables that are sometimes exported (i.e. $prompt and
  $version) need to be made exportable if they are inherited from the
  environment.
  Portability: don't call sigaction() for SIGKILL or SIGSTOP; don't
  hand a garbage signal mask to sigaction() (thanks Jeremy
  Fitzhardinge).  Also, remove use of SA_INTERRUPT (SUSv3, BSD,
  etc. have SA_RESTART with the inverted meaning).
2002-08-20
  Bug: don't call ealloc(0) on systems where getgroups() doesn't
  return egid (thanks Chris Siebenmann).
2002-11-27
  Bug: history dumps core if more colons than substitutions (thanks
  Callum Gibson); history fails to avoid itself if it's the only
  command; history writes and reads outside allocated memory.
  Configuration: upgrade to autoconf-2.56 and automake-1.7.1.
2003-07-17
  Testing: remove test for large file support, as it causes
  indigestion on file systems that don't support sparse files (thanks
  Scott Schwartz).
2003-07-22
  Release: rc-1.7.1.
2003-09-24
  Tidiness: minor improvements to input.c.
2014-02-26
  Bug: fix for CVE-2014-1936 from Jakub Wilk.
2014-06-29
  Documentation: update email and web addresses.
2014-08-31
  Feature: support quoting for filename completion in GNU readline.
2014-09-01
  Bug: quoting of glob characters was broken (thanks Christian
  Neukirchen); fix the "sneaky parens" bug properly (thanks Wolfgang
  Zekoll).
  Feature: allow $"x as a synonym for $^x
  Release: rc-1.7.2.
2015-04-03
  Packaging: the rc.spec file was very out-of-date.
2015-04-04
  Portability: the comment from 1999-08-19 may well have been true at
  the time, but the final version of the C99 standard called varargs
  copying macro va_copy().
2015-04-07
  Portability: look in -ltinfo for tgetent.
  Packaging: various autoconf / automake updates and tweaks.
2015-04-14
  Bug: in initinput(), the call ugchar(EOF) used the ungetcount member
  of the top Input structure without initializing it. Thanks to Jeff
  Johnson for finding this, Robert Scheck for reporting it, and Uli
  Drepper for implementing MALLOC_PERTURB_, a cheap way to find uses of
  uninitialized memory.
2015-04-18
  Licensing: tweaked to match exactly the "zlib with acknowledgement"
  license which is used by nunit and is already approved by various
  distros.
2015-04-20
  Release: rc-1.7.3.
2015-05-12
  Licensing: due to GPL compatibility concerns, the license is changed
  again to the "zlib" license. (N.B. This license change was agreed and
  approved by Byron Rakitzis, who is the copyright holder.)
  Testing: swap arguments to mktemp to be kinder to NetBSD (thanks Piotr
  Meyer).
2015-05-13
  Release: rc-1.7.4.

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:
whitespace

Log message:
Use the HOMEPAGE for this version of rc, not the plan9 one.
(but keep the plan9 url for reference)

Log message:
* .include "../../devel/readline/buildlink3.mk" with USE_GNU_READLINE=yes
  are replaced with .include "../../devel/readline/buildlink3.mk", and
  USE_GNU_READLINE are removed,
* .include "../../devel/readline/buildlink3.mk" without USE_GNU_READLINE
  are replaced with .include "../../mk/readline.buildlink3.mk".