multiple content-types break cgi.py

[Marc 'BlackJack' Rintsch]

In <slrneul7rs.t3l.jon+usenet at snowy.squish.net>, Jon Ribbens wrote:

> It's not a bug - sending multiple content-types is just totally broken.
> What would such a header even be supposed to mean? It's like saying
> "this is an apple orange".

And the correct header for such a beast would be "this is an iOrange" of
course.  ;-)

SCNR,
	Marc 'BlackJack' Rintsch