[Samba] Add user to winbind db.

[Ben Timby]

OK, I just added a user to my Windows domain. I would like to add acls 
for this user on my samba server using setfacl. Thus I need the UID this 
user will map to.

hebe bin # id PROD+site0002
id: PROD+site0002: No such user

I understand that when the user attempts to access the share, winbind 
will perform the mapping to the next available UID in my configured 
range. However, I would like to know if there is a command that can 
force this to occur immediately.