Merge changes made in Gnus trunk.

Merge changes made in Gnus trunk.

auth.texi (GnuPG and EasyPG Assistant Configuration): Fix syntax and trim sentence.
shr.el (shr-current-column): Remove buggy and unnecessary function.
auth.texi: Fix up pxref/xref.
auth.texi (GnuPG and EasyPG Assistant Configuration): Fix up the @item syntax for in-Emacs makeinfo.
gnus-spec.el (gnus-parse-simple-format): princ doesn't really insert anything in Emacs.
mm-decode.el (mm-shr): Allow use from non-Gnus users.
nnimap.el (nnimap-parse-flags): Be more strict when looking for FETCH responses.
nnimap.el, tls.el: Rip the STARTTLS stuff out of tls.el again, and just bind it directly from nnimap.
shr.el (shr-find-fill-point): Use a filling algorithm that should probably work for CJVK text, too.
nnimap.el (nnimap-open-connection): Fix open-tls-stream call.
nnimap.el (nnimap-parse-flags): Fix regexp.
tls.el (tls-program): Remove spurious %s from openssl.
shr.el (shr-find-fill-point): Don't inloop on indented text.