Merge commit '83bef6955e014d40c0f00db9cebe09113154e999'

docs/content/en/functions/getenv.md

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+---
+title: getenv
+description: Returns the value of an environment variable.
+godocref:
+date: 2017-02-01
+publishdate: 2017-02-01
+lastmod: 2017-02-01
+categories: [functions]
+menu:
+  docs:
+    parent: "functions"
+keywords: []
+signature: ["getenv VARIABLE"]
+workson: []
+hugoversion:
+relatedfuncs: []
+deprecated: false
+aliases: []
+---
+
+Takes a string containing the name of the variable as input. Returns
+an empty string if the variable is not set, otherwise returns the
+value of the variable. 
+
+```
+{{ getenv "HOME" }}
+```
+
+{{% note %}}
+In Unix-like environments, the variable must also be exported in order to be seen by `hugo`.
+{{% /note %}}