abstract listening sockets so we have protocol information alongside the socket

test.cfg

@@ -1,7 +1,7 @@
 # Configuration file for testing (use both by sslh under
 # test and the test script `t`)
 
-verbose: 2;
+verbose: 3;
 foreground: true;
 inetd: false;
 numeric: false;
@@ -17,8 +17,8 @@ syslog_facility: "auth";
 listen:
 (
     { host: "localhost"; port: "8080"; keepalive: true; },
-    { host: "localhost"; port: "8081"; keepalive: true; },
-    { host: "localhost"; is_udp: true; port: "4443"; }
+    { host: "localhost"; port: "8081"; keepalive: true; }
+#    { host: "localhost"; is_udp: true; port: "4443"; }
 );