1. option 'health_monitor' 'serial' starts only one background process to monitor the health of
any number of wan's, saving system resources (WHR-HP-G54 with only 16 MB memory is a happy wimp :)
2. option 'icmp_count' '3' can be useful to reduce false positives
3. a sample 'mwanfw' for VoIP traffic
4. "/etc/init.d/multiwan single" restores to the initial state of single wan.
The "stop" command didn't quite do that, and it's now only good for process shutdown
5. numerous minor code cleanups
git-svn-id: svn://svn.openwrt.org/openwrt/packages@23388 3c298f89-4303-0410-b956-a3cf2f4a3e73
c6f4b884fc