Fix SSH tunnel local port

The ssh tunnel was using a port variable that was not defined yet.
I don't know how this was working with electron 0.x versions.
But with electron 1.x that was not working. Probably some upgrade in the v8 has made this wrong behaviour does not work anymore.
Well, this code fix that.

src/db/client.js

@@ -59,11 +59,11 @@ async function connect(server, database) {
       debug('creating ssh tunnel');
       server.sshTunnel = await connectTunnel(server.config);
 
-      const localPort = server.sshTunnel.address().port;
-      debug('ssh forwarding through local port connection %d', localPort);
+      const { address, port } = server.sshTunnel.address();
+      debug('ssh forwarding through local connection %s:%d', address, port);
 
-      server.config.localHost = '127.0.0.1';
-      server.config.localPort = localPort;
+      server.config.localHost = address;
+      server.config.localPort = port;
     }
 
     const driver = clients[server.config.client];

src/db/tunnel.js

@@ -87,6 +87,7 @@ async function _configTunnel(serverInfo) {
     srcPort: 0,
     srcHost: 'localhost',
     localHost: 'localhost',
+    localPort: await getPort(),
   };
   if (serverInfo.ssh.password) config.password = serverInfo.ssh.password;
   if (serverInfo.ssh.passphrase) config.passphrase = serverInfo.ssh.passphrase;