feat(`tofs`): allow TOFS for minion configuration

pillar.example

   #   source_files:
   #     salt-master:
   #       - 'alt_master.d'
+  #     salt-minion:
+  #       - 'alt_minion.d'
 
   # salt master config
   master_config_use_TOFS: True
         - /srv/salt/reactors/deploy.sls
 
   # salt minion config:
+  minion_config_use_TOFS: True
   minion:
 
     # single master setup

salt/defaults.yaml

 
   minion_remove_config: False
   master_remove_config: False
+  minion_config_use_TOFS: False
   master_config_use_TOFS: False
 
   minion_service: salt-minion

salt/files/default/minion.d/beacons.conf

+########################################################################
+## File managed by Salt.
+## Your changes will be overwritten.
+########################################################################

salt/files/default/minion.d/engine.conf

+########################################################################
+## File managed by Salt.
+## Your changes will be overwritten.
+########################################################################

salt/files/default/minion.d/f_defaults.conf

+########################################################################
+## File managed by Salt.
+## Your changes will be overwritten.
+########################################################################

salt/files/default/minion.d/reactor.conf

+########################################################################
+## File managed by Salt.
+## Your changes will be overwritten.
+########################################################################

salt/minion.sls

-{% from "salt/map.jinja" import salt_settings with context %}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import salt_settings with context %}
+{%- from tplroot ~ "/libtofs.jinja" import files_switch with context %}
 
 {% if salt_settings.install_packages and grains.os == 'MacOS' and salt_settings.salt_minion_pkg_source != '' and salt_settings.version != '' %}
 {# only download IF we know where to get the pkg from and if we know what version to check the current install (if installed) against #}
 {% endif %}
   file.recurse:
     - name: {{ salt_settings.config_path }}/minion.d
+    {%- if salt_settings.minion_config_use_TOFS %}
+    - template: ''
+    - source: {{ files_switch(['minion.d'],
+                              lookup='salt-minion'
+                 )
+              }}
+    {%- else %}
     - template: jinja
     - source: salt://{{ slspath }}/files/minion.d
-    - clean: {{ salt_settings.clean_config_d_dir }}
-    - exclude_pat: _*
     - context:
         standalone: False
+    {%- endif %}
+    - clean: {{ salt_settings.clean_config_d_dir }}
+    - exclude_pat: _*
   service.running:
     - enable: True
     - name: {{ salt_settings.minion_service }}