Comment # 18 on bug 1040951 from Samuel Cabrero

I have been testing this and commit [1] is necessary before swapping backend to
smbspool_krb5_wrapper, otherwise the authentication has to be configured
manually (edit printers.conf file or using lpadmin).

After discussing it, we don't need to open a new FATE for this. We will include
the change when samba 4.7 is released.

[1]
https://git.samba.org/?p=asn/samba.git;a=commitdiff;h=c34b29406e274aa679241069243d75e6f4371470