add some NetBSD support in __user_groups

cdist/conf/type/__user_groups/explorer/group

@@ -20,4 +20,4 @@
 
 user="$(cat "$__object/parameter/user" 2>/dev/null || echo "$__object_id")"
 
-(id --groups --name "$user" | tr ' ' '\n' | sort) 2>/dev/null || true
+(id -G -n "$user" | tr ' ' '\n' | sort) 2>/dev/null || true

cdist/conf/type/__user_groups/explorer/oldusermod

@@ -18,4 +18,11 @@
 # along with cdist. If not, see <http://www.gnu.org/licenses/>.
 #
 
+os="$($__explorer/os)"
+
+if [ "$os" = "netbsd" ]; then
+    echo netbsd
+    exit
+fi
+
 usermod --help | grep -q -- '-A group' && echo true || echo false

cdist/conf/type/__user_groups/gencode-remote

@@ -21,8 +21,14 @@
 user="$(cat "$__object/parameter/user" 2>/dev/null || echo "$__object_id")"
 state_should="$(cat "$__object/parameter/state")"
 oldusermod="$(cat "$__object/explorer/oldusermod")"
+os=$(cat "$__global/explorer/os")
 
-if [ "$oldusermod" = "true" ]; then
+if [ "$os" = "netbsd" ]; then
+	# NetBSD does not have a command to remove a user from a group
+	oldusermod="true"
+	addparam="-G"
+	delparam=";;#"
+elif [ "$oldusermod" = "true" ]; then
         addparam="-A"
         delparam="-R"
 else