note 13649 deleted from ref.pfpro by danbrown

Note Submitter: bswenson at ku dot edu ---- If you decide not to use the pfpro functions for any one of several reasons and instead call the pfpro binary with the exec command please note that you must use the putenv function to set the environment variable PFPRO_CERT_PATH that is referred to in the PayFlowPro Developers Guide (see page 12). Otherwise verisign with always return a -31 error - certificate not found.