pgp_strict_enc has no effect

Hi,

I recently played around with the various crypto/pgp related configuration parameters, and noticed that the value of pgp_strict_enc does not affect mutt's behaviour. Signed messages are not encoded if the message body contains only ASCII characters, and will be encoded (using quoted-printable) otherwise, even with set pgp_strict_enc = no in .muttrc. Why is that?

Related: Quoted-printable is recommended in the (obsolete) RFC 2015 for signed messages, while its successor, RFC 3156, recommends either quoted-printable or base64. Is it correct to assume that mutt still refers to RFC 2015 with respect to encoding PGP signed messages?

Thanks, Jan