Set telemetry setting based on disable-telemetry flag

By design the disable-telemetry flag does not affect extension
telemetry, only the setting does, so disabling the setting when the flag
is set should cause extensions to also stop sending telemetry.

Fixes #1116.

src/browser/pages/vscode.html

@@ -23,6 +23,7 @@
     <meta id="vscode-remote-commit" data-settings="{{COMMIT}}" />
     <meta id="vscode-remote-product-configuration" data-settings="{{PRODUCT_CONFIGURATION}}" />
     <meta id="vscode-remote-nls-configuration" data-settings="{{NLS_CONFIGURATION}}" />
+    <meta id="vscode-disable-telemetry" data-value="{{DISABLE_TELEMETRY}}" />
 
     <!-- Workbench Icon/Manifest/CSS -->
     <link rel="icon" href="{{BASE}}/static/{{COMMIT}}/src/browser/media/favicon.ico" type="image/x-icon" />

src/node/app/vscode.ts

@@ -205,6 +205,7 @@ export class VscodeHttpProvider extends HttpProvider {
       .replace(`"{{PRODUCT_CONFIGURATION}}"`, `'${JSON.stringify(options.productConfiguration)}'`)
       .replace(`"{{WORKBENCH_WEB_CONFIGURATION}}"`, `'${JSON.stringify(options.workbenchWebConfiguration)}'`)
       .replace(`"{{NLS_CONFIGURATION}}"`, `'${JSON.stringify(options.nlsConfiguration)}'`)
+      .replace("{{DISABLE_TELEMETRY}}", this.args["disable-telemetry"] ? "true" : "false")
     return this.replaceTemplates(route, response)
   }