mutt: Fix key importing annoyances

smime-keys.patch:

	Sometimes, openssl can't extract the e-mail address from a
	certificate. smime_keys then forgets to update its index file.

	With this patch, smime_keys will ask interactively for an e-mail
	address.

smime-c.patch:

	smime_keys is an interactive tool. mutt, however, runs it as a
	filter. This works just as long as mutt knows exactly what
	smime_keys is going to ask. The patch above, though, breaks with
	mutt's expectations.

	(Well, yes, smime_keys is a special value for SmimeImportCertCommand ...)

	With this patch, mutt will run SmimeImportCertCommand interactively.