[master] fix dyndb issues; isc_errno_toresult()
4445. [cleanup] isc_errno_toresult() can now be used to call the formerly private function isc__errno2result(). [RT #43050] 4444. [bug] Fixed some issues related to dyndb: A bug caused braces to be omitted when passing configuration text from named.conf to a dyndb driver, and there was a use-after-free in the sample dyndb driver. [RT #43050] Patch for dyndb driver submitted by Petr Spacek at Red Hat.