Change HTTPS monitors to be a real check, and add TLS-HELLO type to
perform the older check functionality if desired.
The only reason you would need TLS-HELLO instead of HTTPS is if your
application does client-cert validation, as the HAProxy box won't have a
valid client cert.
Also add missing PING type to the DB, so PING monitors can be used.
Change-Id: I15a79b7fb0c2ff1020090b4057909a1f41a2c8ad
897214a4ff