disable X-Mailer:? (was: [Announce] Mutt 0.95.3 is out.)

[Claus Assmann]

On Fri, Feb 12, 1999, Thomas Roessler wrote:
> Mutt 0.95.3 is out. This version should be considered BETA.

Question: how can I disable the X-Mailer: header? Before this
version I used to patch config.h, but now the definition is in
acconfig.h, which seems to be nowhere included...
Is there some easy/recommended way to do this?
(currently I've added the define to config.h again).