[Samba] Win7-samba3.3.6 additional

[zaphodmhn at fsklaw.com]

tcpdump during domain join provides little useful info.  jlzltoc is Win7
testbox is samba 3.3.6 server:

14:31:26.785327 IP jlzltoc.fsklaw.net.netbios-dgm >
testbox.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:26.786056 IP testbox.fsklaw.net.netbios-dgm >
jlzltoc.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:26.885050 IP jlzltoc.fsklaw.net.netbios-dgm >
testbox.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:26.885655 IP testbox.fsklaw.net.netbios-dgm >
jlzltoc.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:26.991651 IP jlzltoc.fsklaw.net.netbios-dgm >
testbox.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:26.992108 IP testbox.fsklaw.net.netbios-dgm >
jlzltoc.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:27.716546 IP jlzltoc.fsklaw.net.netbios-dgm >
testbox.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)
14:31:27.717106 IP testbox.fsklaw.net.netbios-dgm >
jlzltoc.fsklaw.net.netbios-dgm: NBT UDP PACKET(138)