Ruby

ext/openssl/ossl_ssl.c: Use const declaration if LibreSSL >= 2.8.0

to suppress a warning in OpenBSD.

ossl_ssl.c:938:31: warning: incompatible pointer types passing 'SSL_SESSION *(SSL *, unsigned char *, int, int *)' (aka 'struct ssl_session_st *(struct ssl_st *, unsigned char *, int, int *)') to parameter of type 'SSL_SESSION *(*)(struct ssl_st *, const unsigned char *, int, int *)' (aka 'struct ssl_session_st *(*)(struct ssl_st *, const unsigned char *, int, int *)') [-Wincompatible-pointer-types]
        SSL_CTX_sess_set_get_cb(ctx, ossl_sslctx_session_get_cb);
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/openssl/ssl.h:738:20: note: passing argument to parameter 'get_session_cb' here
    SSL_SESSION *(*get_session_cb)(struct ssl_st *ssl,
                   ^
1 warning generated.