add missing documentation

lib/routes/avatars.js

@@ -5,6 +5,9 @@ var cache = require("../cache");
 var path = require("path");
 var url = require("url");
 
+// handle the appropriate 'default=' response
+// uses either mhf_steve or mhf_alex (based on +userId+) if no +def+ given
+// callback: response object
 function handle_default(img_status, userId, size, def, req, err, callback) {
   def = def || skins.default_skin(userId);
   var defname = def.toLowerCase();

lib/routes/index.js

@@ -15,6 +15,7 @@ function compile() {
 
 compile();
 
+// GET index request
 module.exports = function(req, callback) {
   if (config.server.debug_enabled) {
     // allow changes without reloading

lib/routes/renders.js

@@ -8,8 +8,9 @@ var path = require("path");
 var url = require("url");
 var fs = require("fs");
 
-// valid types: head, body
-// overlay is query param
+// handle the appropriate 'default=' response
+// uses either mhf_steve or mhf_alex (based on +userId+) if no +def+ given
+// callback: response object
 function handle_default(rid, scale, overlay, body, img_status, userId, size, def, req, err, callback) {
   def = def || skins.default_skin(userId);
   var defname = def.toLowerCase();

lib/routes/skins.js

@@ -5,6 +5,9 @@ var path = require("path");
 var lwip = require("lwip");
 var url = require("url");
 
+// handle the appropriate 'default=' response
+// uses either mhf_steve or mhf_alex (based on +userId+) if no +def+ given
+// callback: response object
 function handle_default(img_status, userId, def, req, err, callback) {
   def = def || skins.default_skin(userId);
   var defname = def.toLowerCase();