[9.18] fix: usr: Add a compatibility shim for older libuv versions (< 1.19.0)
The uv_stream_get_write_queue_size() is supported only in relatively newer versions of libuv (1.19.0 or higher). Provide a compatibility shim for this function , so BIND 9 can be built in environments with older libuv version.
Fixes: #4822 (closed)
Edited by Ondřej Surý