Bug#911976: bind-dyndb-ldap FTBFS with bind 9.11.5

[peter green]

Tags 911976 +patch
Thanks

This seems to be a simple case of a missing include, I just uploaded a fix to 
raspbian. A debdidf should appear soon at 
https://debdiffs.raspbian.org/main/b/bind-dyndb-ldap . No intent to NMU in 
Debian.