Configure DHCP and DNS 2/3

Note: The following code may be replaced with systemd equivalent.

dnsmasq and hostapd daemons can be started by script.

Create /usr/local/bin/hostapdstart

	  # Start dns service for LAN
	  service dnsmasq restart
	  sysctl net.ipv4.ip_forward=1
	  iptables -t nat -A POSTROUTING -s ! -d -j MASQUERADE

	  # Start access point service
	  ifup wlan0ap
	  iwconfig wlan0 txpower 7mW
	  hostapd /etc/hostapd/hostapd.conf

Adjust txpower 7mW as necessary.
If too low, access point will be invisible, error rate too high, and/or bit rate too slow.
If too high, access point will be competing too much with other access points and/or bit rate too slow.