copy_res()

copy_res() is using for deep copying the Res object. It is necessary especially for async operations.

Res *copy_res(const Res *original);

Example usage:

typedef struct
{
    Res *res;
} ctx_t;

void handler(Req *req, Res *res)
{
    ctx_t *ctx = malloc(sizeof(*ctx));
    ctx->res = copy_res(res);
}