Real server auto-discovery support. First step.

Real server auto-discovery support. First step.

The server auto-discovery support works only when the SRV records backs an errorfor each domain
{ "sipinternaltls", "tcp", SIPE_TRANSPORT_TLS }, /* for internal TLS connections */
{ "sipinternal",    "tcp", SIPE_TRANSPORT_TCP }, /* for internal TCP connections */
{ "sip",            "tls", SIPE_TRANSPORT_TLS }, /* for external TLS connections */
{ "sip",            "tcp", SIPE_TRANSPORT_TCP }, /*.for external TCP connections */

but the dns server retuns results doesn't mean we can connect to that server,
just mean the domain was resolve. Unfortunately the process stays in an infinite loop with this wrong domain.

The good way is to continue with the next domain if it fails to connect.
The process backs to the begin after the last domain in the list.
Works for me on OCS2007 with a external TLS server.