this script enables the undocumented `marshal -p' options
(also undocumented is -n) to invoke pgp to encrypt
outgoing mail, thus: mail -pse rsc@swtch.com

Notes:
Wed Dec 21 08:23:05 EST 2005 rsc
    I think instead the undocumented -p option
    should just invoke pgp correctly to begin with.
    
    I have no idea where -p came from, but we don't
    have a /bin/pgp anyway, so I'm tempted to just
    remove the whole thing.
    
    Where did you get a /bin/pgp?
    


Reference: /n/sources/patch/sorry/upas-pgp
Date: Wed Dec 21 12:06:08 CET 2005
Reviewed-by: rsc

--- /386/bin/upas/pgp	Thu Jan  1 00:00:00 1970
+++ /386/bin/upas/pgp	Wed Dec 21 12:03:47 2005
@@ -0,0 +1,5 @@
+#!/bin/rc
+# pgp as a filter instead of some whacked-out DOS program.
+# also add options to produce textual output.
+echo				# prevent confusion with headers
+exec /bin/pgp -fat $*