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

roles/grub-config/defaults/main.yml

@@ -1,5 +1,5 @@
 system:
   shutdown: poweroff
-  grub:
-    timeout: 0
-    boot_options: quiet nosplash
+grub:
+  timeout: 0
+  boot_options: quiet nosplash

roles/grub-config/tasks/main.yml

@@ -11,6 +11,6 @@
       dest: /etc/default/grub
       state: present
       regexp: '^(GRUB_CMDLINE_LINUX_DEFAULT=")'
-      line: '\1{{ system.grub.boot_options}}"'
+      line: '\1{{ grub.boot_options}}"'
       backrefs: yes
   notify: [ 'Update GRUB' ]

roles/grub-config/templates/50_custom.j2

@@ -10,7 +10,7 @@ menuentry "PowerOff" {
 {% endif %}
 
 if [ "${recordfail}" = 1 ]; then
-    set timeout={{ 3 if system.grub.timeout < 3 else system.grub.timeout }}
+    set timeout={{ 3 if grub.timeout < 3 else grub.timeout }}
 else
-    set timeout={{ system.grub.timeout if system.grub.timeout is defined else 0 }}
+    set timeout={{ grub.timeout if grub.timeout is defined else 0 }}
 fi