+** EX_PROTOCOL -- the remote system returned something that
+** was "not possible" during a protocol exchange.
+** EX_NOPERM -- You did not have sufficient permission to
+** perform the operation. This is not intended for
+** file system problems, which should use NOINPUT or
+** CANTCREAT, but rather for higher level permissions.
+** For example, kre uses this to restrict who students
+** can send mail to.