Stop using clean: True on /etc/salt/{minion,master}.d

New versions of Salt put config files in /etc/salt/{minion,master}.d. We don't
want to erase them by using a clean: True on the file.recurse. This is a
backward incompatible change, but it's necessary to avoid deleting Salt config
files.

Resolves #104

salt/defaults.yaml

@@ -10,3 +10,4 @@ salt:
   salt_cloud: salt-cloud
   salt_api: salt-api
   salt_ssh: salt-ssh
+  clean_config_d_dir: False

salt/master.sls

@@ -7,7 +7,7 @@ salt-master:
     - name: {{ salt_settings.config_path }}/master.d
     - template: jinja
     - source: salt://salt/files/master.d
-    - clean: True
+    - clean: {{ salt_settings.clean_config_d_dir }}
   service.running:
     - enable: True
     - name: {{ salt_settings.master_service }}

salt/minion.sls

@@ -7,7 +7,7 @@ salt-minion:
     - name: {{ salt_settings.config_path }}/minion.d
     - template: jinja
     - source: salt://salt/files/minion.d
-    - clean: True
+    - clean: {{ salt_settings.clean_config_d_dir }}
     - context:
         standalone: False
   service.running:

salt/standalone.sls

@@ -7,7 +7,7 @@ salt-minion:
     - name: {{ salt_settings.config_path }}/minion.d
     - template: jinja
     - source: salt://salt/files/minion.d
-    - clean: True
+    - clean: {{ salt_settings.clean_config_d_dir }}
     - context:
         standalone: True
   service.dead: