[Mutt] #3052: Feature request: (customisable?) non-empty description field for application/pgp attachments

[Mutt <fleas@xxxxxxxx>]

#3052: Feature request: (customisable?) non-empty description field for
application/pgp attachments

 When using PGP with GPGME to sign messages, an application/pgp-signature
 part is added to the message, containing the GPG-signed hash of the text
 part.

 This attachment does not have a description, which tends to confuse non
 tech-savy recipients (depending on their MUA) who try to manually open the
 signature and, of course, fail.

 Adding a default description when signing (with PGP, but maybe also using
 other schemes?) a message would help preventing this type of situation.
 Additionally, a user-configurable variable could be supplied (say,
 `pgp_signature_description`).

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Ticket URL: <http://dev.mutt.org/trac/ticket/3052>