python-dns: fixed URL

Signed-off-by: Denis Shulyaka <Shulyaka@gmail.com>
Merge pull request #503 from Shulyaka/master

python-dns: fixed URL
mailman: fixed compilation errors (Issue #498)

Signed-off-by: Denis Shulyaka <Shulyaka@gmail.com>
Merge pull request #504 from Shulyaka/master

mailman: fixed compilation errors (Issue #498)