Fix doc pathnames in README.Debian
Fix doc pathnames in README.Debian

In the top of the file /usr/share/doc/bind9/README.Debian.gz the reference to
the file /usr/doc/bind9-doc/misc/migration.gz from the package bind9-doc is
incorrect.

The right path should be : /usr/share/doc/bind9-doc/misc/migration.gz

Addresses-Debian-Bug: 266891
Signed-off-by: LaMont Jones <0ab8dc438f73addc98d9ad5925ec8f2b97991703@debian.org>

tjaalton/bind9,tjaalton/bind9,tjaalton/bind9,tjaalton/bind9,tjaalton/bind9,tjaalton/bind9