update: do not delete WTVSec on last socket, instead recreate on prereg

update: clean up SSID session data only if client is not seen for 3 minutes
update: add shouldWeCompress() function
update: tweak lzpf (still corrupted)
update: rename wtv-setup:/get to wtv-setup:/get-settings
update: add additional headers to wtv-setup:/get-settings
update: add initial blank wtv-music:/get-playlist

zefie_wtvp_minisrv/WTVClientSessionData.js

@@ -51,6 +51,15 @@ class WTVClientSessionData {
         return false;
     }
 
+    currentConnections() {
+        if (this.data_store) {
+            if (this.data_store.sockets) {
+                return this.data_store.sockets.size;
+            }
+        }
+        return 0;
+    }
+
     get(key = null) {
         if (typeof (this.data_store) === 'undefined') return null;
         else if (key === null) return this.data_store;