lf_gui_cmd: fixes broken --port option; fixes whitespace

lf_gui_cmd.pl

@@ -37,8 +37,10 @@ my $show_help = 0;
 ########################################################################
 
 my $usage = qq($0  [--manager { hostname or address of LANforge GUI machine } ]
-                 [--port {port name} ]
+                 [--port {port name} ] # cli-socket port default 3990
+                                       # careful, your cli-socket might be 3390!
                  [--ttype {test instance type} ]
+                    # likely types: "cv", "WiFi Capacity", "Port Bringup", "Port Reset"
                  [--tname {test instance name} ]
                  [--tconfig {test configuration name, use defaults if not specified} ]
                  [--rpt_dest {Copy report to destination once it is complete} ]
@@ -70,6 +72,10 @@ if ($show_help) {
    exit 0;
 }
 
+if ((defined $port) && ($port > 0)) {
+  $lfmgr_port = $port;
+}
+
 # Open connection to the LANforge server.
 my $t = new Net::Telnet(Prompt => '/lfgui\# /',
          Timeout => 20);