Message header formatting

[Jon Steinhart]

I've been getting increasingly annoyed at the number of header lines
that fill a screen or two before I can even see message contents.  I
keep adding to an already huge ignores line in my mhl.format but new
headers seem to be created daily.

Is there any incantation for "show only the headers explicitly listed
in mhl.format" so that new and uninteresting headers from everybody's
latest spam filter, mailing list manager, and internal tracking don't
fill the screen.

BTW, when looking at this I noticed that while the mhl man page has
examples for the ignores variable that it's missing from the list of
variables on that page.

Jon