Fix var scoping issue while doing intraline highlights

+ I hate var scoping in JS.
+ Also update server.go to point to Gerrit.

Change-Id: I9bb035cd7eca5d5c029052611ea28b7d67fd6f98

polygerrit-ui/server.go

diff --git a/polygerrit-ui/server.go b/polygerrit-ui/server.go
index a7ec44c..59a09b0 100644
--- a/polygerrit-ui/server.go
+++ b/polygerrit-ui/server.go
@@ -30,7 +30,7 @@
 )
 
 var (
-	restHost = flag.String("host", "canary-chromium-review.googlesource.com", "Host to proxy requests to")
+	restHost = flag.String("host", "gerrit-review.googlesource.com", "Host to proxy requests to")
 	port     = flag.String("port", ":8081", "Port to serve HTTP requests on")
 	prod     = flag.Bool("prod", false, "Serve production assets")
 	loggedIn = flag.Bool("logged_in", false, "Return user info as if the user is logged in")