Beatify for realz README.md and kick luci-config.

Also touch new cq.cfg to make it different from old one.

TBR=nodir@chromium.org

No-True: true
No-Presubmit: true
Bug: 815072
Change-Id: Ic6ed3e0a7afbece7fa4d4b95fb5c3f8c4023ae63
Reviewed-on: https://chromium-review.googlesource.com/936201Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538973}

infra/config/branch/README.md

@@ -3,7 +3,7 @@
 This directory contains configurations specific to the git ref (branch) they are
 located on.
 
-TODO(tandrii): although cq.cfg is located here, it actually applies to globally
+**TODO(tandrii)**: although cq.cfg is located here, it actually applies to globally
 to the whole repository. Tracking bug to fix this is https://crbug.com/719954.
 
 Currently active version can be checked at

infra/config/branch/cq.cfg

@@ -17,7 +17,7 @@ verifiers {
   }
 
   tree_status {
-    tree_status_url: "https://chromium-status.appspot.com"
+    tree_status_url: "https://chromium-status.appspot.com/"
   }
 
 # NOTE: when adding new configs to the commit queue, please contact