Detect moinmoin wiki via its cookies (#2334)

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src/apps.json

@@ -6129,6 +6129,9 @@
       "js": {
         "show_switch2gui": ""
       },
+      "cookies": {
+        "MOIN_SESSION": ""
+      },
       "icon": "MoinMoin.png",
       "implies": "Python",
       "script": "moin(?:_static(\\d)(\\d)(\\d)|.+)/common/js/common\\.js\\;version:\\1.\\2.\\3",