TLS configuration

[Alan DeKok]

Matthew Newton wrote:
> I've been a bit busy with other things, but have now got around to
> doing this. There's a branch at the following URL with a set of
> patches to do it.

  OK.  I added some comments, mostly minor.

> I did this by caching the result in tls_server_conf_parse - if
> it's passed the same CONF_SECTION as the previous time, it returns
> the same conf pointer. As the EAP sections are pretty much always
> going to be called consecutively, this saves re-parsing each time.
> 
> It was about 5 lines of code - dunno if it was what you were
> thinking or not ;-)

  It's not.  Static variables are generally bad.  My comments on github
suggest a better way.

  Alan DeKok.