add example for singleton

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

conf/manifest/init

@@ -12,6 +12,7 @@ __file /etc/cdist-configured --type file
 case "$__target_host" in
    # Everybody has this
    localhost)
+      # Usual example
       __file test --type file --destination /tmp/cdist-testfile
    ;;
 
@@ -26,6 +27,9 @@ case "$__target_host" in
       
       # The __package type autoselect the right type based on the os
       __package vim --state installed
+
+      # If the type is a singleton, it does not take an object id
+      __issue
    ;;
    # This is how it would look like on gentoo
    cdist-gentoo)

conf/type/__issue/manifest

@@ -20,7 +20,7 @@
 #
 
 destination=/etc/issue
-os="$(cat "out/explorer/os")"
+Zs="$(cat "out/explorer/os")"
 
 case "$os" in
    archlinux)