[type/__sysctl] Add Mac OS X support

cdist/conf/type/__sysctl/gencode-remote

@@ -31,7 +31,13 @@ os=$(cat "$__global/explorer/os")
 case "$os" in
     redhat|centos|ubuntu|debian|devuan|archlinux|coreos|netbsd)
         flag='-w'
-    ;;
+		;;
+	macosx)
+		# NOTE: Older versions of Mac OS X require the -w option.
+		#       Even though the flag is not mentioned in new man pages anymore,
+		#       it still works.
+		flag='-w'
+		;;
     freebsd|openbsd)
         flag=''
     ;;

cdist/conf/type/__sysctl/manifest

@@ -28,7 +28,7 @@ case "$os" in
       :
    ;;
    # BSD
-   freebsd|netbsd|openbsd)
+   freebsd|macosx|netbsd|openbsd)
       :
    ;;
    *)