alt-fetch: comment fix

plugins/alt-fetch.js

@@ -64,8 +64,9 @@
          */
         let fetchContentFromAlternativeEndpoints = (url, init={}) => {
             
-            // we're going to try a random endpoint and building an URL of the form:
-            // https://<endpoint_address>/<pubkey>/<rest_of_URL>
+            // remove the https://original.domain/ bit to get the relative path
+            // TODO: this assumes that URLs we handle are always relative to the root
+            // TODO: of the original domain, this needs to be documented
             var path = url.replace(/https?:\/\/[^/]+\//, '')
             
             // we really want to make fetch happen, Regina!