commit 8d1b60bf828ab842731b91af121fcf8a27854811
Author: Olav Reinert <seroton10@gmail.com>
Date:   Sun May 17 16:47:44 2020 +0200

    Ensure PDF support (via CUPS)
    
    This is needed to ensure that suitable printers are discovered.

diff --git a/airprint-generate.py b/airprint-generate.py
index ed224ff..358d627 100644
--- a/airprint-generate.py
+++ b/airprint-generate.py
@@ -71,6 +71,7 @@ DOCUMENT_TYPES = {
     'application/pdf': True,
     'application/postscript': True,
     'application/vnd.cups-postscript': True,
+    'application/vnd.cups-pdf': True,
     'application/vnd.cups-raster': True,
     'application/octet-stream': True,
     'image/urf': True,