Allow doc-view to open password-protected PDF files (bug#33684)

* lisp/doc-view.el (doc-view-ghostscript-options): Removed "-sDEVICE"
option.
(doc-view-ghostscript-device): New customizable variable, passed as
"-sDEVICE" option to GhostScript.
(doc-view-pdf-password-protected-ghostscript-p): New function.
(doc-view-pdf->png-converter-ghostscript): Can now open
password-protected PDF files.
(doc-view-pdfdraw-program-subcommand): New function.
(doc-view-pdf-password-protected-pdfdraw-p): New function.
(doc-view-pdf->png-converter-mupdf): Can now open password-protected
PDF files.
* etc/NEWS: Mention new doc-view-mode feature.

1 files changed, 1 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 2e3d92f2515..bbfc3285ee6 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -334,6 +334,7 @@ asked to use :host 'local and :family 'ipv6.
 
 ** doc-view-mode
 *** New commands doc-view-presentation and doc-view-fit-window-to-page
+*** Added support for password-protected PDF files
 
 ** map.el
 *** Now also understands plists.