Shut down the asynchronous DNS resolver and terminate all active requests.
If the 'fail_requests' option is enabled, all active requests will return
an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise,
the requests will be silently discarded.
@param evdns_base the evdns base to free
@param fail_requests if zero, active requests will be aborted; if non-zero,
active requests will return DNS_ERR_SHUTDOWN.
@see evdns_base_new()
Shut down the asynchronous DNS resolver and terminate all active requests.
If the 'fail_requests' option is enabled, all active requests will return an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise, the requests will be silently discarded.
@param evdns_base the evdns base to free @param fail_requests if zero, active requests will be aborted; if non-zero, active requests will return DNS_ERR_SHUTDOWN. @see evdns_base_new()