* grub-core/net/tftp.c: Retransmit ack when rereceiving old packet.

	Try to handle more than 0xFFFF packets.
	Reported by: Bernhard Übelacker <bernhardu>.
	He also spotted few overflows in first version of this patch.

diff --cc ChangeLog
index c891a32fccec8e73f3ce913ea76588af553c9eb0,8ebfb47798375aa2b64f46cfafefff51a219d886..39541adb494ec83d2eb0f1b63ce91db35c0f1d3c
--- 1/ChangeLog
--- 2/ChangeLog
+++ b/ChangeLog
@@@ -1,75 -1,10 +1,82 @@@
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/loader/i386/bsd.c (grub_cmd_openbsd): Accept "sd", "cd",
 +      "vnd", "rd" and "fd" disks.
 +
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      Move grub_disk_write out of kernel into disk.mod.
 +
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/kern/misc.c (grub_vsnprintf_real): Unify int and wchar
 +      handling.
 +
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/kern/misc.c (grub_abort): Make static
 +
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/kern/misc.c (grub_vsnprintf_real): Don't attempt to
 +      transform invalid unicode codepoints.
 +
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/kern/misc.c (grub_vsnprintf_real): Remove needless explicit
 +      \0 checking.
 +
 +2013-10-27  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/lib/legacy_parse.c: Add support for "nd" disk.
 +
 +2013-10-26  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      Consolidate cpuid code.
 +
 +2013-10-26  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      Move cpuid code to cpuid.h and TSC code to tsc.c.
 +
 +2013-10-26  Grégoire Sutre  <gregoire.sutre@gmail.com>
 +
 +      * util/grub.d/00_header.in: Don't use LANG if it's not set.
 +
 +2013-10-26  Grégoire Sutre  <gregoire.sutre@gmail.com>
 +
 +      * util/grub-mkconfig.in: Replace $0 with $self.
 +      * util/grub-reboot.in: Likewise.
 +      * util/grub-set-default.in: Likewise.
 +
 +2013-10-26  BVK Chaitanya  <bvk.groups@gmail.com>
 +
 +      * docs/osdetect.cfg: New file.
 +
 +2013-10-26  BVK Chaitanya  <bvk.groups@gmail.com>
 +
 +      * tests/util/grub-shell.in: Add new --debug option.
 +
 +2013-10-26  BVK Chaitanya  <bvk.groups@gmail.com>
 +
 +      * tests/test_unset.in: New test.
 +
 +2013-10-26  BVK Chaitanya  <bvk.groups@gmail.com>
 +
 +      * tests/test_sha512sum.in: New test.
 +
 +2013-10-26  Vladimir Serbinenko  <phcoder@gmail.com>
 +
 +      * grub-core/fs/iso9660.c: Replace strncat with memcpy.
 +      * include/grub/misc.h: Remove strncat.
 +      * grub-core/lib/posix_wrap/string.h: Likewise.
 +
+ 2013-10-26  Vladimir Serbinenko  <phcoder@gmail.com>
+ 
+       * grub-core/net/tftp.c: Retransmit ack when rereceiving old packet.
+       Try to handle more than 0xFFFF packets.
+       Reported by: Bernhard Übelacker <bernhardu>.
+       He also spotted few overflows in first version of this patch.
+ 
  2013-10-26  Vladimir Serbinenko  <phcoder@gmail.com>
  
        * tests/date_unit_test.c: New test.