Add execution module for working in sls files

doc/ref/modules/all/index.rst

@@ -260,6 +260,7 @@ Full list of builtin execution modules
     service
     shadow
     slack_notify
+    slsutil
     smartos_imgadm
     smartos_virt
     smartos_vmadm

salt/modules/slsutil.py

@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+'''
+Utility functions for use with or in SLS files
+'''
+from __future__ import absolute_import
+
+from salt.utils.dictupdate import merge, update
+
+update.__doc__ = update.__doc__ + '''\
+
+CLI Example:
+
+.. code-block:: shell
+
+    salt '*' slsutil.update '{foo: Foo}' '{bar: Bar}'
+
+'''
+
+merge.__doc__ = '''\
+Merge a data structure into another by choosing a merge strategy
+
+Strategies:
+
+* aggregate
+* list
+* overwrite
+* recurse
+* smart
+
+CLI Example:
+
+.. code-block:: shell
+
+    salt '*' slsutil.merge '{foo: Foo}' '{bar: Bar}'
+'''