* freebsd4/sys/netinet/udp_usrreq.c: the data in the ip header should be restored when the extended udp header and data checksum is calculated.  this caused some trouble in the code which the ip header is not modified.  for example, inbound policy lookup failed.
* freebsd4/sys/netinet/udp_usrreq.c:
the data in the ip header should be restored when the extended udp
header and data checksum is calculated.  this caused some trouble
in the code which the ip header is not modified.  for example,
inbound policy lookup failed.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame