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master ed943db 2/2: Document the OpenPGP header

From: Lars Ingebrigtsen
Subject: master ed943db 2/2: Document the OpenPGP header
Date: Sat, 8 Aug 2020 09:49:58 -0400 (EDT)

branch: master
commit ed943db794987cb6fc87b55d68d6164190ba9a24
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Document the OpenPGP header
    * doc/misc/message.texi (Using the OpenPGP Header): Document the
    OpenPGP header (bug#39964).
 doc/misc/message.texi | 23 +++++++++++++++++++++++
 etc/NEWS              |  1 +
 2 files changed, 24 insertions(+)

diff --git a/doc/misc/message.texi b/doc/misc/message.texi
index d8a889e..d6df1a6 100644
--- a/doc/misc/message.texi
+++ b/doc/misc/message.texi
@@ -1042,6 +1042,7 @@ and/or encrypted messages as explained in the following.
 * Signing and encryption::      Signing and encrypting commands.
 * Using S/MIME::                Using S/MIME
 * Using OpenPGP::               Using OpenPGP
+* OpenPGP Header::              Adding OpenPGP headers to messages.
 * Passphrase caching::          How to cache passphrases
 * PGP Compatibility::           Compatibility with older implementations
 * Encrypt-to-self::             Reading your own encrypted messages
@@ -1251,6 +1252,28 @@ according to two different standards, namely 
@acronym{PGP} or
 @code{mml-default-sign-method} determine which variant to prefer,
 @acronym{PGP/MIME} by default.
+@node OpenPGP Header
+@subsection OpenPGP Header
+The @samp{OpenPGP} header can be used to provide information about the
+sender's OpenPGP key.  This is a formalisation and modernisation of
+the non-standard @samp{X-PGP-Key} (etc.) headers that have been in use
+for a long time.  For more details, see
+@vindex message-openpgp-header
+To use this in Message, say:
+(add-hook 'message-send-hook 'messasge-add-openpgp-header)
+@end lisp
+Then customize the @code{message-openpgp-header} variable according to
+your PGP setup.  The variable is a list of the key ID, the key URL or
+ASCII armoured, and the protection preference, one of
+@samp{"unprotected"}, @samp{"sign"}, @samp{"encrypt"} or
 @node Passphrase caching
 @subsection Passphrase caching
diff --git a/etc/NEWS b/etc/NEWS
index d290344..269b076 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -246,6 +246,7 @@ not.
 ** Message
 *** Message now supports the OpenPGP header.
 To generate these headers, add the new function
 'messasge-add-openpgp-header' to 'message-send-hook'.  The header will

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