8.2.1: wrong master address in slave zone header comment

[Paul A Vixie]

> i usually do this instead.  it doesn't speak much for threading (since
> it goes from one static object to two, but it will let you use
> inet_ntoa() more than once in a printf().

i'm usually willing to do stuff like that in private code, but never in
libraries.  it's perhaps a little more functional, but much harded to debug
when you exceed the limit.