Do not use acroread, use pdf2ps from gs for PDF
See: https://patches.ubuntu.com/by-release/extracted/ubuntu/a/a2ps/1:4.13c~rc5-1/05_no_acroread_for_pdf.dpatch
## 05_no_acroread_for_pdf.dpatch by Masayuki Hatta <mhatta@debian.org>
Index: b/etc/a2ps_cfg.in
===================================================================
--- a/etc/a2ps_cfg.in
+++ b/etc/a2ps_cfg.in
@@ -291,8 +291,8 @@
@COM_PSUTILS@@COM_pdf2ps@Delegation: pdf2ps pdf:ps \
@COM_PSUTILS@@COM_pdf2ps@ @pdf2ps@ '$f' #f0 && #{del.psselect} #f0 | #{del.psnup}
# Delegated to AcrobatReader
-@COM_PSUTILS@@COM_acroread@Delegation: Acrobat pdf:ps \
-@COM_PSUTILS@@COM_acroread@ #{del.acroread} < '$f' | #{del.psselnup}
+#@COM_PSUTILS@@COM_acroread@Delegation: Acrobat pdf:ps \
+#@COM_PSUTILS@@COM_acroread@ #{del.acroread} < '$f' | #{del.psselnup}
########## PostScript files
# Pass the PostScript files to psnup and psselect