freeside/Freeside — pull request #18 by Jayceh (2013-09-20 16:32:19+00:00)
Title: Add in an optional banned-pay padding to prefix cards to be stored. 

This assists in PCI compliance, where even though the pad is stored in the db,
having the cards stored in an unpadded md5 is considered a no no.

Very simply, add an optional prefix pad when md5'ing for the banned pay table.