show build flags on webapp about page

Assistant/WebApp/Documentation.hs

@@ -12,6 +12,7 @@ module Assistant.WebApp.Documentation where
 import Assistant.WebApp.Common
 import Assistant.Install (standaloneAppBase)
 import Build.SysConfig (packageversion)
+import BuildFlags
 
 {- The full license info may be included in a file on disk that can
  - be read in and displayed. -}

templates/documentation/about.hamlet

@@ -26,3 +26,5 @@
     . ♥
     <p>
     Version: #{packageversion}
+    <br>
+    Build flags: #{unwords buildFlags}