vpopmail / qmail testers needed

[Justin Mason]

hi folks.  could someone using vpopmail/qmail please test this patch:

https://issues.apache.org/SpamAssassin/show_bug.cgi?id=2536
(patch id 4432)

A fix to vpopmail/qmail support is unlikely to make it into 3.3.0
without testers.

--j.