* mml1991.el (mml1991-pgg-sign): Make sure to load pgg.el before binding pgg-*

* mml1991.el (mml1991-pgg-sign): Make sure to load pgg.el before binding pgg-*
 variables;
 reimplement the section which prevents MIME header from being signed.
(mml1991-pgg-encrypt): Make sure to load pgg.el before binding pgg-text-mode;
 remove a blank line at the top of body.

* mm-uu.el (mm-uu-pgp-encrypted-extract-1): Don't remove blank lines at the top
 of body;
 use gnus-newsgroup-charset if there's no Charset header.