Moved include/in.h to include/gpxe/in.h, so that it can be included by

prototester.

src/include/dns.h

 #define DNS_RESOLVER_H
 
 #include "stdint.h"
-#include "in.h"
+#include <gpxe/in.h>
 #include "ip.h"
 #include "udp.h"
 

src/include/etherboot.h

 #define	RARP_REQUEST	3
 #define	RARP_REPLY	4
 
-#include	"in.h"
+#include <gpxe/in.h>
 
 
 /* Helper macros used to identify when DHCP options are valid/invalid in/outside of encapsulation */

src/include/igmp.h

 #define	IGMP_H
 
 #include "stdint.h"
-#include "in.h"
+#include <gpxe/in.h>
 
 #define IGMP_QUERY	0x11
 #define IGMPv1_REPORT	0x12

src/include/ip.h

 
 #include "stddef.h"
 #include "stdint.h"
-#include "in.h"
+#include <gpxe/in.h>
 
 struct iphdr {
 	uint8_t  verhdrlen;

src/include/proto.h

 
 #include "tables.h"
 #include "buffer.h"
-#include "in.h"
+#include <gpxe/in.h>
 
 struct protocol {
 	char *name;

src/include/resolv.h

 #ifndef RESOLV_H
 #define RESOLV_H
 
-#include "in.h"
+#include <gpxe/in.h>
 #include "tables.h"
 
 struct resolver {

src/include/tftp.h

 
 /** @file */
 
-#include "in.h"
+#include <gpxe/in.h>
 #include "buffer.h"
 #include "nic.h"
 #include "ip.h"
 	 * TFTP server.  Note that the first data block is block 1; a
 	 * value of 0 indicates that no data blocks have yet been
 	 * received.
+	 *
+	 * For multicast TFTP protocols, where the blocks may not be
+	 * received in strict order, the meaning of this field changes
+	 * slightly, to "first missing block minus one".  For example,
+	 * suppose that we have received blocks 1, 2, 4 and 5; this
+	 * field would then have the value 2, since the first missing
+	 * block is block 3.  If the blocks do arrive in strict order,
+	 * this definition is exactly equivalent to "most recently
+	 * received block".
 	 */
 	unsigned int block;
 };

src/include/udp.h

 
 #include "stddef.h"
 #include "stdint.h"
-#include "in.h"
+#include <gpxe/in.h>
 #include "ip.h"
 
 struct udp_pseudo_hdr {

src/include/url.h

 #define URL_H
 
 #include "proto.h"
-#include "in.h"
+#include <gpxe/in.h>
 
 extern int parse_url ( char *url, struct protocol **proto,
 		       struct sockaddr_in *server, char **filename );

src/proto/nfs.c

 #include "etherboot.h"
 #include "init.h"
 #include "proto.h"
-#include "in.h"
+#include <gpxe/in.h>
 #include "nic.h"
 
 /* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read: