Ticket #684. Dispatch the reloading of the interface in dial-on-demand case to easy the GUI responsivess.
Decouple filter.inc from functions.inc. There is no need to process filter functions most of the time. Include filter.inc where it is needed
Rework includes/require. This saves about 4 megabytes.Simplify get_memory(). Tested on mips/i386
Rename interfaces_wan_configure to interface_configure now that it is used for all assigned interface configuration.
These files are not rc.filter_configure
Add hooks for reloading lan, wan and optional interfaces