[Samba] other question. nsupdate samba_update

[L.P.H. van Belle]

In the samba_update command. 
 
I was looking how the nsupdate command of bind was processed. 
 
i looked for something like: 
 
gsstsig                   (use GSS_TSIG to sign the request)
or 
oldgsstsig                (use Microsoft's GSS_TSIG to sign the request)

which sets the signing for the update itselfs. 
Or is this not used? 
 
( learning mode )   ;-) 
 
Greetz, 
 
Louis