Update fault()'s output to inidcate the possibly meaninglessness of the reported system error.
Merge pull request #93 from flimzy/fault-cleanup

Update fault()'s output to inidcate the possible meaninglessness of the error
tests for Qpsmtpd/SMTP

* order the ‘use’  pragmas
* compact the new() method
* move fault() tests into t/qpsmtpd-smtp.t
update MANIFEST and suppress helo test error