This update for bind fixes the following issues:

- Fix an assertion failure in the 'rehash()' function (bsc#1188763)
When calculating the new hashtable bitsize, there was an off-by-one error
that would allow the new bitsize to be larger than maximum allowed.
- tsig-keygen is now used to generate DDNS keys (bsc#1187921)

This update was imported from the SUSE:SLE-15:Update update project.