Add default sysfs settings

This uses the new Alpine sysfs.conf service to allow config of sysfs.

Default file that sets transparent huge pages to only be used on request
to fix #368

Database setting available for user configuration.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

alpine/packages/hostsettings/etc/init.d/hostsettings

@@ -10,7 +10,7 @@ start() {
 	ebegin "Configuring host settings from database"
 
 	mobyconfig exists etc/sysctl.conf && mobyconfig get etc/sysctl.conf > /etc/sysctl.conf
-
+	mobyconfig exists etc/sysfs.conf && mobyconfig get etc/sysfs.conf > /etc/sysfs.conf
 	mobyconfig exists etc/resolv.conf && mobyconfig get etc/resolv.conf > /etc/resolv.conf
 
 	mobyconfig exists etc/hosts && mobyconfig get etc/hosts >> /etc/hosts

alpine/packages/sysctl/etc/sysctl.d/01-moby.conf

@@ -1,4 +0,0 @@
-vm.max_map_count = 262144
-net.core.somaxconn = 1024
-fs.inotify.max_user_watches = 524288
-fs.file-max = 524288