NetBIOS scopes have been broken for a long time in Samba, which is some

NetBIOS scopes have been broken for a long time in Samba, which is some
indication of the number of people who use them!

(A loop in name_mangle requires len = 0 at the beginning of each name
component; it was being reset to 0 on a '.', which meant that the for loop
then incremented it to 1 by the beginning of the next component.)