Improved checking for content type to allow for charset, etc.

ca-store-generator.js

@@ -218,7 +218,7 @@ function run(filename) {
         return;
       }
 
-      if (response.headers['content-type'] !== 'text/plain') {
+      if (response.headers['content-type'].indexOf('text/plain') !== 0) {
         console.error("Fetching failed with incorrect content type %s", response.headers['content-type']);
         reject({ code: 2, error: "Fetching failed with incorrect content type " + response.headers['content-type'] });
         return;