Second Life Login Protocol XMLRPC header

[animats]

This is only of interest to people doing third party viewers.

When connecting to the login server, the HTTP header of the XMLRPC request must contain a header item

"Content-Type", "text/xml"

or an HTTP error 400 is returned. But the more modern form

"Content-Type", "text/xml; charset=utf-8"

will not work. Using that also produces an HTTP error 400.

Took two days to find this.