r4309: idl and torture test for lsa_GetUserName()

r4309: idl and torture test for lsa_GetUserName()

why does samba3 return domain_name as in the unknown_name field in the code
and on the wire it returns DCERPC_FAULT_OP_RNG_ERROR?

all of my test machines NT4,W2K,W2K3,XP returned NULL

and if I file the string in the .in.* the server echos the strings back
and returns NT_STATUS_INVALID_PARAMETER

metze
(This used to be commit 67e765b7e984d7aac2a7786b5bd0c80d10d6de5d)