Add role to install nfs-server, cleanup roles and configuration

- use generic media_dirs including vdr recdir, loop over them to
  create directories, configure samba, nfs, etc.
- add role to install an configure nfs-kernel-server
- cleanup roles
- add custom fact modules

handlers/main.yml

@@ -5,3 +5,11 @@
     enabled: yes
     #masked: no
   register: samba_reload
+
+- name: Restart NFS Kernel Server
+  systemd:
+    name: nfs-server.service
+    state: restarted
+    enabled: yes
+    #masked: no
+  register: nfs_reload