Several things:

(1) Add a bunch of tedious type casts to eliminate unnecessary compiler warnings on Windows X64 builds.

(2) Some EthernetTap work to integrate Windows custom IOCTL for multicast group lookup (not done quite yet).

(3) Dump some more info in selftest to make sure our Windows path lookup functions are returning sane results.

node/EthernetTap.hpp

@@ -99,22 +99,6 @@ public:
 	 */
 	void whack();
 
-	/**
-	 * Set whether or not DHCP is enabled (disabled by default)
-	 *
-	 * @param dhcp DHCP status
-	 * @return New state of DHCP (may be false even on 'true' if DHCP enable failed)
-	 */
-	bool setDhcpEnabled(bool dhcp);
-
-	/**
-	 * Set whether or not DHCP6 is enabled (disabled by default)
-	 *
-	 * @param dhcp DHCP6 status
-	 * @return New state of DHCP6 (may be false even on 'true' if DHCP enable failed)
-	 */
-	bool setDhcp6Enabled(bool dhcp);
-
 	/**
 	 * Set the user display name for this connection
 	 *
@@ -230,9 +214,6 @@ private:
 	void (*_handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &);
 	void *_arg;
 
-	bool _dhcp;
-	bool _dhcp6;
-
 	Thread _thread;
 
 #ifdef __UNIX_LIKE__