Connection: default to lowercased version of original attribute name if no mapping exists

lib/Connection.js

@@ -20,12 +20,7 @@ var MAX_INT = 9007199254740992,
       'RFC822.SIZE': 'size',
       'BODY': 'struct',
       'BODYSTRUCTURE': 'struct',
-      'UID': 'uid',
-      'INTERNALDATE': 'date',
-      'FLAGS': 'flags',
-      'X-GM-THRID': 'x-gm-thrid',
-      'X-GM-MSGID': 'x-gm-msgid',
-      'X-GM-LABELS': 'x-gm-labels'
+      'INTERNALDATE': 'date'
     },
     CRLF = '\r\n',
     RE_CMD = /^([^ ]+)(?: |$)/,
@@ -1217,7 +1212,7 @@ Connection.prototype._resUntagged = function(info) {
       var msg = this._curReq.fetchCache[info.num],
           keys = Object.keys(info.text),
           keyslen = keys.length,
-          toget, msgEmitter, j;
+          toget, msgEmitter, j, key;
 
       if (msg === undefined) {
         // simple case -- no bodies were streamed
@@ -1257,7 +1252,10 @@ Connection.prototype._resUntagged = function(info) {
                   for (var k = 0, lenk = labels.length; k < lenk; ++k)
                     labels[k] = (''+labels[k]).replace(RE_ESCAPE, '\\');
                 }
-                attrs[FETCH_ATTR_MAP[toget[i]]] = info.text[keys[j]];
+                key = FETCH_ATTR_MAP[toget[i]];
+                if (!key)
+                  key = toget[i].toLowerCase();
+                attrs[key] = info.text[keys[j]];
               }
               toget.splice(i, 1);
               break;