Log Message:
mail/cyrus-imapd{,23}: Remove work directory references in scripts.

The installed cyradm shell script contained the path to the shell
in the tools directory instead of the system /bin/sh.  This
happened as part of the build process by the Perl MakeMaker system
used to build the Cyrus Perl modules.  Make the replacement at
post-build time to change it back to /bin/sh.

This fix was mirrored from the identical fix to the cyrus-imapd24
module by jnemeth@pkgsrc.org.

Bump the PKGREVISION of the cyrus-imapd and cyrus-imapd23 packages
due to the change in the installed script.