https bug + fix

Hi,

we were just troubleshooting an icecast instance that wouldn't accept a new certificate (the previous one ran fine but was from a different CA).
It looked like it should work or libssl was doind default things that were not desired.

In the end justdave took a look and fixed it.
Here's his ticket. - https://trac.xiph.org/ticket/1717

From my understanding this adds support for chained certificates (which is quite common use for web servers).

Can we get that patch reviewed and into trunk?

Cheers

Thomas