libwebsockets

ss: reset retry count for explicit connection request

This differentiates between client connections for retry / writeable requests
and explicit lws_ss_client_connect() api calls.  The former effectively uses
retry / backoff, and the latter resets the retry / backoff.

If you receive ALL_RETRIES_FAILED due to the retry policy, you can do whatever
you need to do there and call lws_ss_client_connect() to try to connect again
with a fresh, reset retry / backoff state.