Alter mime type (#1599)

* Add a "default" MIME type for browser sniffing

* Apparently some current browsers only push/sniff this now. Nothing like not following standards \*eyeroll\*
* Older browsers still push/sniff `application/` and should retain some compatibility regardless of the state of the browsers interpretation of IANA
* Converting to a switch casing... this is likely to be argued about forever... so make it prettier than `if..else` for change tracking

Refs:
* https://tools.ietf.org/html/rfc4329#page-9  *(IANA ... note the obsolete for `text\javascript`)*
* https://developer.mozilla.org/docs/Web/HTTP/Basics_of_HTTP/MIME_types#JavaScript_types  *(Note the contradiction)*
* https://openuserjs.org/discuss/Selected_file_is_not_JavaScript. *(Report)*

Applies to #872

* Remove Opera Presto MIME type

* Since this was removed with the TLSv1 EOL

Applies to #1599 #1430

Author: Martii

controllers/user.js

@@ -1679,14 +1679,16 @@ exports.uploadScript = function (aReq, aRes, aNext) {
     }
 
     // Reject non-js file
-    if (!(script.type === 'application/javascript'
-      || script.type === 'application/x-javascript')) {
-
-      statusCodePage(aReq, aRes, aNext, {
-        statusCode: 400,
-        statusMessage: 'Selected file is not JavaScript.'
-      });
-      return;
+    switch (script.type) {
+      case 'application/javascript':   // #1599
+      case 'text/javascript':          // Default
+        break; // Acceptable
+      default:
+        statusCodePage(aReq, aRes, aNext, {
+          statusCode: 400,
+          statusMessage: 'Selected file is not JavaScript.'
+        });
+        return;
     }
 
     // Reject huge file