My little hacks.

doc/kernel-patches.txt

+FREEBSD 4.3 Patches:
+
+/usr/src/lib/libstand/net.c:
+*** Minor errno=0 fix to avoid repeated error condition never being
+    cleared.
+
+/usr/src/lib/libstand/tftp.c:
+*** Minor errno=0 fix and minimum tftp packet size check fix. Both of
+    these from freebsd.org
+
+*** Local change: Add "rootpath" to the tftp path, since our tftpd
+    rejects client requests that are not properly rooted in one of the
+    allowed directories. That is /boot/kernel is not allowed, but
+    instead must be /tftpboot/boot/kernel. Now, "rootpath" is a
+    library global that holds the DHCP root-path option, and is used
+    in the NFS side of things, but is not used in the tftp side. I
+    don't know why, and it seems like this could never work without
+    it.
+
+/usr/src/sys/boot/i386/Makefile.inc:
+*** Various definitions for building pxeldr support with TFTP, higher
+    console speed, hardwired serial console. 
+
+/usr/src/sys/boot/i386/pxeldr/Makefile:
+/usr/src/sys/boot/i386/pxeldr/pxeldr.s:
+*** Minor ifdefs to put boot loader into serial mode. This is
+    necessary since the pxeldr bypasses the first two boot stages, and
+    so there are no boot flags passed in. Maybe there is a way to pass
+    boot flags in via DHCP, but I don't know what it is.
+
+/usr/src/sys/boot/i386/libi386/pxe.c:
+*** Minor pxe/rom bug workarounds to avoid trashed pointer (esi
+    register), as discoverd by Mike in the OSKit pxeboot program.
+