Filtering headers in Kannel

Hi,

A feature I would like to have / implement in Kannel is HTTP header 
filtering.

Most urgent I would like this feature for the PPG.

Currently, if you submit e.g. by "curl" a PPG request, the generated 
short message(s) even contains the "curl" user-agent, together with some 
other useless headers of the "outer" HTTP request. This is certainly not 
worth extending the push from 1 to 2 short messages.

However, I think the feature of filtering headers also for normal WAP 
requests and responses makes sense.

E.g., the "Server" header is included in nearly every HTTP response, but 
rarely of use for a mobile client.

I would like to suggest a header white-list and a header black-list that 
can be configured in Kannel, e.g.

For wapbox:
request-headers-white-list / request-headers-black-list
response-headers-white-list / response-headers-black-list

For PPG:
headers-white-list
headers-black-list

A useful sample for the PPG would be:

group = ppg
headers-white-list = "X-Wap-Application-Id Content-Type"

I understand that filtering especially HTTP request headers for Wap 
requires in-depth understanding of HTTP.
But I would prefer a "symetric" solution.

Could I get comments on this?

Best regards,



Georg