include/ssl_compat.h: fix build with libressl >= 3.5.0

Fix the following build failure with libressl >= 3.5.0:

In file included from /tmp/instance-10/output-1/build/mariadb-10.3.36/vio/viosslfactories.c:18:
/tmp/instance-10/output-1/build/mariadb-10.3.36/vio/viosslfactories.c: In function 'get_dh2048':
/tmp/instance-10/output-1/build/mariadb-10.3.36/include/ssl_compat.h:68:45: error: invalid use of incomplete typedef 'DH' {aka 'struct dh_st'}
   68 | #define DH_set0_pqg(D,P,Q,G)            ((D)->p= (P), (D)->g= (G))
      |                                             ^~

Fixes:
 - http://autobuild.buildroot.org/results/524198344aafca58d214537af64c5961c407b0f8

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

include/ssl_compat.h

@@ -19,7 +19,8 @@
 /* OpenSSL version specific definitions */
 #if defined(OPENSSL_VERSION_NUMBER)
 
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && \
+	!(defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x30500000L)
 #define HAVE_OPENSSL11 1
 #define SSL_LIBRARY OpenSSL_version(OPENSSL_VERSION)
 #define ERR_remove_state(X) ERR_clear_error()