server: restore compatibility with spaceapi v13

Apparently this is still required for some clients.

server/status.php

@@ -6,6 +6,7 @@
     $date=$arr[1]; //lastchange: upadate via file see explode/implode
     echo <<< eot
 {
+  "api":"0.13",
   "api_compatibility":["14"],
   "space":"IT-Syndikat",
   "logo":"https://it-syndikat.org/api/images/its_l.png",
@@ -30,6 +31,7 @@
     "email":"wir@it-syndikat.org",
     "matrix":"#lobby:it-syndik.at"
   },
+  "issue_report_channels":["email"],
   "membership_plans":[
     {
       "name": "Normal membership",