0105b: kill snippets endpoint #528

it's too hard to follow AS changes, and work out if disabling showing items (basic toggling of show/hide sections etc) actually stops downloading a localized local copy etc. For items we actually want to block, let the endpoint slaughter begin.

user.js

@@ -109,9 +109,10 @@ user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", "");
 /* 0105b: disable Activity Stream Snippets
  * Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server
  * [1] https://abouthome-snippets-service.readthedocs.io/ ***/
+user_pref("browser.aboutHomeSnippets.updateUrl", "");
+user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "");
 user_pref("browser.newtabpage.activity-stream.disableSnippets", true);
 user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
-user_pref("browser.aboutHomeSnippets.updateUrl", "");
 /* 0105c: disable Activity Stream Top Stories, Pocket-based and/or sponsored content ***/
 user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
 user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);