fix(freebsd): make kernel module name configurable

With FreeBSD 13 if_tap was merged into if_tuntap.
https://reviews.freebsd.org/D20044

Author: alxwr

openvpn/general_config.sls

@@ -42,8 +42,11 @@ openvpn_config_dir:
 {%- if grains.os_family == 'FreeBSD' %}
 openvpn_kldload_if_tap:
   kmod.present:
-    - name: if_tap
+    - name: {{ map.kernel_module_name }}
     - persist: True
+    - unless:
+      # In case the kernel has the module compiled in, we skip this state.
+      - sh -c "kldstat -v | grep --quiet --extended-regexp '^\s+[0-9]+ {{ map.kernel_module_name }}$'"
     - require_in:
       - sls: openvpn.config
 {%- endif %}

openvpn/parameters/os_family/FreeBSD.yaml

@@ -16,4 +16,5 @@ values:
   user: openvpn
   manage_user: false
   manage_group: false
+  kernel_module_name: if_tuntap
 ...

openvpn/parameters/osfinger/FreeBSD-11.yaml

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+#
+# Setup variables specific to salt['config.get']('osfinger') == FreeBSD-11.
+# You just need to add the key:values for this `osfinger` that differ
+# from `defaults.yaml`.
+#
+# If you do not need to provide defaults via the `osfinger` config,
+# you can remove this file or provide at least an empty dict, e.g.
+# values: {}
+---
+values:
+  kernel_module_name: if_tap
+...

openvpn/parameters/osfinger/FreeBSD-12.yaml

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+#
+# Setup variables specific to salt['config.get']('osfinger') == FreeBSD-12.
+# You just need to add the key:values for this `osfinger` that differ
+# from `defaults.yaml`.
+#
+# If you do not need to provide defaults via the `osfinger` config,
+# you can remove this file or provide at least an empty dict, e.g.
+# values: {}
+---
+values:
+  kernel_module_name: if_tap
+...