sysctl: read settings from /etc/sysctl.d/*.conf

This changes makes it possible to store custom settings
in individual files inside the directory /etc/sysctl.d/.

Signed-off-by: Stefan Tomanek <stefan.tomanek+openwrt@wertarbyte.de>

SVN-Revision: 46239

package/base-files/Makefile

@@ -55,6 +55,8 @@ define Package/base-files/conffiles
 /etc/config/
 /etc/dropbear/
 /etc/crontabs/
+/etc/sysctl.d/local.conf
+/etc/sysctl.d/
 $(call $(TARGET)/conffiles)
 endef