Merge pull request #702 from laf/docs

Updated old email alerting doc to tell people to use new alerting doc

doc/Extensions/Email-Alerting.md

@@ -1,3 +1,7 @@
+### **This page is deprecated**
+
+#### Please see [The new alerting docs](http://docs.librenms.org/Extensions/Alerting/#transports-email)
+
 Currently, the email alerts needs to be set up in the config. If you want to enable it, paste this in your config and change it:
 
 ```php
@@ -20,4 +24,4 @@ $config['alerts']['email']['default_only'] = FALSE;   // Only use default recipi
 $config['alerts']['email']['enable']       = TRUE;    // Enable email alerts
 $config['alerts']['bgp']['whitelist']      = NULL;    // Populate as an array() with ASNs to alert on.
 $config['alerts']['port']['ifdown']        = FALSE;   // Generate alerts for ports that go down
-```
+```