Update sensor.cert_expiry.markdown (home-assistant#2701)

stickystyle · Landrash · commit 54902f91e7c4 · 2017-05-24T11:59:34.000+02:00
`name` is an optional variable for `cert_expiry`. If you don't use it all your certs just show up as "SSL Certificate Expiry" as their name.
diff --git a/source/_components/sensor.cert_expiry.markdown b/source/_components/sensor.cert_expiry.markdown
@@ -27,6 +27,7 @@ Configuration variables:
 
 - **host** (*Required*): The host FQDN (or IP) to retrieve certificate from.
 - **port** (*Optional*): The port number where the server is running. Defaults to `443`.
+- **name** (*Optional*): The friendly name for the certificate.
 
 <p class='note warning'>
 Make sure that the URL exactly matches your endpoint or resource.
