add protection against requesting direct service files

zefie_wtvp_minisrv/ServiceVault/wtv-head-waiter/finalize-security.js

@@ -1,3 +1,5 @@
+var minisrv_service_file = true;
+
 var challenge_response, challenge_header = '';
 var gourl;
 

zefie_wtvp_minisrv/ServiceVault/wtv-head-waiter/login-stage-two.js

@@ -1,3 +1,5 @@
+var minisrv_service_file = true;
+
 var challenge_response, challenge_header = '';
 var gourl;
 

zefie_wtvp_minisrv/ServiceVault/wtv-head-waiter/login.js

@@ -1,3 +1,5 @@
+var minisrv_service_file = true;
+
 var challenge_response, challenge_header = "";
 
 var gourl = "wtv-head-waiter:/login-stage-two?";

zefie_wtvp_minisrv/ServiceVault/wtv-head-waiter/relogin.js

@@ -1,3 +1,5 @@
+var minisrv_service_file = true;
+
 var gourl = "wtv-1800:/preregister?";
 if (request_headers.query.relogin) gourl += "relogin=true";
 else if (request_headers.query.reconnect) gourl += "reconnect=true";