This is a policy choice of Golang, but a C library like Curl (the topic of this thread) is not constrained by the policy choices of the Go developers. Curl cou

This is a policy choice of Golang, but a C library like Curl (the topic of this thread) is not constrained by the policy choices of the Go developers. Curl could use MADV_WIPEONFORK or other primitives to restart its DNS thread automatically.