Merge pull request #32476 from terminalmage/opkg-override

Add link to provider override docs to opkg.py

salt/modules/opkg.py

@@ -2,6 +2,12 @@
 '''
 Support for Opkg
 
+.. important::
+    If you feel that Salt should be using this module to manage packages on a
+    minion, and it is using a different module (or gives an error similar to
+    *'pkg.install' is not available*), see :ref:`here
+    <module-provider-override>`.
+
 .. versionadded: 2016.3.0
 
 .. note::