[type/__sysctl] Group entries

cdist/conf/type/__sysctl/gencode-remote

@@ -29,18 +29,26 @@ fi
 
 os=$(cat "$__global/explorer/os")
 case "$os" in
-    redhat|centos|ubuntu|debian|devuan|alpine|archlinux|gentoo|openwrt|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=''
-    ;;
+   # Linux
+   redhat|centos|ubuntu|debian|devuan|archlinux|gentoo|coreos)
+      flag='-w'
+      ;;
+   # BusyBox
+   alpine|openwrt)
+      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'
+      ;;
+   netbsd)
+      flag='-w'
+      ;;
+   freebsd|openbsd)
+      flag=''
+   ;;
 esac
 
 # set the current runtime value