Remove first oNCP negotiation request (only second is necessary)

Remove first oNCP negotiation request (only second is necessary)

The current oNCP (Juniper) protocol support issues two separate
oNCP negotiation requests.

1) POST /dana/js?prot=1&svc=1 HTTP/1.1
   <ignore response body>
   <teardown and restart TLS connection>

2) POST /dana/js?prot=1&svc=4 HTTP/1.1
   <continue using open TLS connection for oNCP tunnel>

The first of these two requests appears to be totally unnecessary, based on
testing with two different Juniper gateways, one of which returns
"NCP-Version: 2" and one which returns "NCP-Version: 3" in response to the
oNCP negotiation requests.

Removing the first request saves an additional TLS negotiation (2-3
roundtrips with TLS 1.0) and allows the connection to start faster.