Mario de Sousa <msousa@fe.up.pt> [Mon, 01 Jun 2020 14:27:56 +0100] rev 10
correct version of --> Allow "" and NULL on TCP host and service (=> IP=INADDR_ANY, and port=0)
Mario de Sousa <msousa@fe.up.pt> [Mon, 01 Jun 2020 14:24:57 +0100] rev 9
Undo changes inserted in previous commit (included 2 unrelated changes)