... if process_encrypted_request() fails.
This makes it more obvious that the connection will not be reused.
Previously serve() relied on CSP_FLAG_SERVER_CONTENT_LENGTH_SET
and CSP_FLAG_CHUNKED being unset.
Inspired by a patch from Joshua Rogers.
if (JB_ERR_OK != process_encrypted_request(csp))
{
+ csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
return;
}