Log Message:
Add SHA512 digests for distfiles for mail category

Problems found locating distfiles:
	Package mutt: missing distfile patch-1.5.24.rr.compressed.gz
	Package p5-Email-Valid: missing distfile Email-Valid-1.198.tar.gz
	Package pine: missing distfile fancy.patch.gz
	Package postgrey: missing distfile targrey-0.31-postgrey-1.34.patch
	Package qmail: missing distfile badrcptto.patch
	Package qmail: missing distfile outgoingip.patch
	Package qmail: missing distfile qmail-1.03-realrcptto-2006.12.10.patch
	Package qmail: missing distfile qmail-smtpd-viruscan-1.3.patch
	Package thunderbird24: missing distfile enigmail-1.7.2.tar.gz
	Package thunderbird31: missing distfile enigmail-1.7.2.tar.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.