[build] Rename gPXE to iPXE

Access to the gpxe.org and etherboot.org domains and associated
resources has been revoked by the registrant of the domain.  Work
around this problem by renaming project from gPXE to iPXE, and
updating URLs to match.

Also update README, LOG and COPYRIGHTS to remove obsolete information.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/ath5k/ath5k.c

@@ -5,7 +5,7 @@
  * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
  * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
  *
- * Modified for gPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>
+ * Modified for iPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>
  * Original from Linux kernel 2.6.30.
  *
  * All rights reserved.
@@ -46,11 +46,11 @@
 FILE_LICENCE ( BSD3 );
 
 #include <stdlib.h>
-#include <gpxe/malloc.h>
-#include <gpxe/timer.h>
-#include <gpxe/netdevice.h>
-#include <gpxe/pci.h>
-#include <gpxe/pci_io.h>
+#include <ipxe/malloc.h>
+#include <ipxe/timer.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/pci.h>
+#include <ipxe/pci_io.h>
 
 #include "base.h"
 #include "reg.h"
@@ -1239,7 +1239,7 @@ accept:
 		iob_put(iob, rs.rs_datalen);
 
 		/* The MAC header is padded to have 32-bit boundary if the
-		 * packet payload is non-zero. However, gPXE only
+		 * packet payload is non-zero. However, iPXE only
 		 * supports standard 802.11 packets with 24-byte
 		 * header, so no padding correction should be needed.
 		 */
@@ -1508,7 +1508,7 @@ ath5k_tx(struct net80211_device *dev, struct io_buffer *iob)
 
 	/*
 	 * The hardware expects the header padded to 4 byte boundaries.
-	 * gPXE only ever sends 24-byte headers, so no action necessary.
+	 * iPXE only ever sends 24-byte headers, so no action necessary.
 	 */
 
 	if (list_empty(&sc->txbuf)) {