pdb API and auth.c

[Steve Holstead]

I managed to create and plugin my own database backend. It works fine, 
however I noticed that when an invalid combination of ID/PASSWD is 
recieved, the auth_methods try 10 times before giving up. I noticed 
that when I add an auth methods = "sam" in the smb.conf file the attempts 
reduce to 5 times(ie. eliminating guest).

Why does this happen? I an concerned about my passdb backend getting 
called soo many times with one invalid password.