mail-filter/spamassassin: new revision with correct build dependencies.

mail-filter/spamassassin: new revision with correct build dependencies.

The existing dependencies for spamassassin were all thrown into
DEPEND and then propagated to RDEPEND -- even the ones that were
obviously only needed at runtime. Marcin Mirosław helped track down
the correct value of DEPEND, and the rest of the optional dependencies
were moved to RDEPEND.

The required and optional dependencies are now stored in
REQDEPEND/OPTDEPEND variables to eliminate duplication. This is
primarily useful with USE=test, which makes DEPEND a superset of
RDEPEND, since the other inclusion alreads holds normally. Once the
test suite had the correct dependencies, the RESTRICT=test was
removed, and problematic spamc/spamd tests were disabled. The test
suite should pass now.

Gentoo-Bug: 592682

Package-Manager: portage-2.2.28