add mine_get function to master config

salt/files/master.d/_defaults.conf

 # The example below enables minion foo.example.com to get 'network.interfaces' mine
 # data only, minions web* to get all network.* and disk.* mine data and all other
 # minions won't get any mine data.
+{% if 'mine_get' in cfg_master -%}
+mine_get:
+{%- for minion, data in cfg_master['mine_get']|dictsort %}
+  {{ minion }}:
+{%- for command in data %}
+    - {% raw %}'{% endraw %}{{ command }}{% raw %}'{% endraw %}
+{%- endfor -%}
+{%- endfor -%}
+{% elif 'mine_get' in cfg_salt -%}
+mine_get:
+{%- for minion, data in cfg_salt['mine_get']|dictsort %}
+  {{ minion }}:
+{%- for command in data %}
+    - {% raw %}'{% endraw %}{{ command }}{% raw %}'{% endraw %}
+{%- endfor -%}
+{%- endfor -%}
+{% else -%}
 # mine_get:
 #   foo.example.com:
 #     - network.interfaces
 #   web.*:
 #     - network.*
 #     - disk.*
+{%- endif %}
 
 
 #####         Logging settings       #####