Allow forwarding of all open messages in the current view.

In response to id:"87fvyhb40x.fsf@alice.fifthhorseman.net".

v2:
- Use multiple message forwarding to implement single message
  forwarding.


David Edmondson (2):
  emacs: Add `notmuch-show-forward-open-messages'.
  emacs: `notmuch-show-forward-message' can use
    `notmuch-mua-new-forward-messages'

 emacs/notmuch-mua.el  | 62 +++++++++++++++++++++++++++++++++++++--------------
 emacs/notmuch-show.el | 15 +++++++++++--
 2 files changed, 58 insertions(+), 19 deletions(-)

-- 
2.1.4