bpo-34710: fix SSL module build (GH-9347)


Include ``openssl/dh.h`` header file to fix implicit function declaration of ``DH_free()``.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
(cherry picked from commit b3a271fc0ce3e13e427be8914decfc205a220ca8)

Co-authored-by: Alexandru Ardelean <ardeleanalex@gmail.com>
2 files changed