openlayers/openlayers — pull request #915 by Karamell (2013-03-22 14:04:08+00:00)
Title: Add an attribute  to control the label outline opacity

Creates a nice effect when a text overlays a high contrasting background layer

![opacity](https://f.cloud.github.com/assets/1788091/290994/2b068c90-92f9-11e2-923c-160a529e5263.png)