[Samba] Kerberos config.

[Meli Marco]

Somewhere I've read to rename krb5.conf file and leave "net ads join" found
the right ads server on the network.
Beliving that it could be flexible method I try to mv krb5.conf to
krb5.seek, but result is:
ads_connect: Cannot contact any KDC for requested realm!
What's wrong?
Also why leaving krb5.conf and settings password server = * it works but
takes an ads server on another network?
Who estabilish the precedence?
Thanks.
Marco.