* improvements to dhcpv4 server
* begin adding examples/httpserver
* add better VLAN tagging methods
* pcap: add error printing; fix bug in CRC
* ipv4: ToS and Flags construction and flag manipulation improvements
* add dhcp interception to httptap and improve httpserver example
* dhcpv4: fix several issues
* condition flipped in Encapsulate
* check for correct bounds in ForEachOption
* getMessageType didn't check for opt
* dhcpv4: preserve backing buffer in reset
Pat Whittingslow
Egon Elbre