bug#36527: 27.0.50; The users' Content-Type isn't respected by Message

[Lars Ingebrigtsen]

It should be possible for the user to say

  Content-type: text/foobar

in Message mode buffers and have that be respected.  I took some stabs
at making the mml bit not rewrite it a couple of days ago, but
apparently there's more in Message that'll rewrite it.

An added wrinkle is that Message should still be allowed to add a
charset="..." part to the Content-Type (if needed).  But it should still
keep the type.


In GNU Emacs 27.0.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2019-07-06 built on stories
Repository revision: a2d365a7fae21fa3be1947fb11fc6384410d1837
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description: Debian GNU/Linux 9 (stretch)


-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no