Build named with DLZ is broken on 9.16

gcc  -include /home/vagrant/git/bind9/config.h -I/home/vagrant/git/bind9 -I../.. -I./include -I./unix/include -I. -I/home/vagrant/git/bind9/lib/ns/include -I../../lib/ns/include -I/home/vagrant/git/bind9/lib/dns/include -I../../lib/dns/include -I/home/vagrant/git/bind9/lib/bind9/include -I../../lib/bind9/include -I/home/vagrant/git/bind9/lib/isccfg/include -I../../lib/isccfg/include -I/home/vagrant/git/bind9/lib/isccc/include -I../../lib/isccc/include -I/home/vagrant/git/bind9/lib/isc/include -I../../lib/isc -I../../lib/isc/include -I../../lib/isc/unix/include -I../../lib/isc/pthreads/include -I../../contrib/dlz/drivers/include  -I/usr/include/mysql            -DCONTRIB_DLZ  -DDLZ_MYSQL  -g -O2 -pthread -fPIC  -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith -Wno-missing-field-initializers -fno-strict-aliasing  -c ../../contrib/dlz/drivers/dlz_mysql_driver.c
../../contrib/dlz/drivers/dlz_mysql_driver.c:66:14: error: conflicting types for ‘my_bool’
 typedef bool my_bool;
              ^~~~~~~
In file included from ../../contrib/dlz/drivers/dlz_mysql_driver.c:45:0:
/usr/include/mysql/mysql.h:53:14: note: previous declaration of ‘my_bool’ was here
 typedef char my_bool;
              ^~~~~~~
Makefile:632: recipe for target 'dlz_mysql_driver.o' failed
make[2]: *** [dlz_mysql_driver.o] Error 1