It doesn't generate PJL output because of two bugs.  The first is
checking the size of the prepend and the append arrays.  The second
is that the prepend array size was checked instead of the append
array at the end of the job.

(rob:90) diff mfomatic.orig mfomatic
347c347
<           "\33%-12345X\@PJL RESET\n\@PJL EOJ\n");
---
>           "\033%-12345X\@PJL RESET\n\@PJL EOJ\n");
553c553
<           if ( @pjlprepend > 1 ) {
---
>           if ( @pjlprepend > 0 ) {
559c559
<           if ( @pjlprepend > 1 ) {
---
>           if ( @pjlappend > 0 ) {