Update headers to support bind 9.11.5
    
    BIND updated its headers without backward compatiblity layer inside.
    New releases removed custom types from its own sources, like
    isc_uint32_t and isc_boolean_t. They replaced it with standard types
    uint32_t and bool. Until all usages are replaced, this is required to
    compile. Unfortunately no backward compatiblity is provided.