mail-filter/spamassassin: new revision that lets spamd run as root (openrc).

mail-filter/spamassassin: new revision that lets spamd run as root (openrc).

The r13 revision of spamassassin came with a new init script (and
systemd service file) that runs spamd as the "spamd" user by default,
and that choice is not configurable. There is however a legitimate use
case for running spamd as root; namely, when local users have their
configurations or bayes databases stored in their home directories on
the local filesystem.

This new revision adds back the ability to run spamd as root, through
the SPAMD_RUN_AS_ROOT variable in the OpenRC service configuration
file. This should suffice for the users who have reported problems so
far, and a similar fix for the systemd service is on its way.

The pkg_postinst phase of the ebuild alerts users to the new
configuration variable.

Bug: https://bugs.gentoo.org/635790
Package-Manager: Portage-2.3.8, Repoman-2.3.3