Fix includes as well

Author: Benno Evers

libcaf_openssl/src/openssl/session.cpp

@@ -5,7 +5,10 @@
 #include "caf/openssl/session.hpp"
 
 #include <optional>
+
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
 #include <openssl/decoder.h>
+#endif
 
 CAF_PUSH_WARNINGS
 #include <openssl/err.h>
@@ -277,7 +280,7 @@ SSL_CTX* session::create_ssl_context() {
       SSL_CTX_set_default_passwd_cb_userdata(ctx, this);
     }
     if (auto var = pem_string_from_envvar(cfg.openssl_key)) {
-#if OPENSSL_VERSION_NUMBER < 0x10101000L
+#if OPENSSL_VERSION_NUMBER < 0x30000000L
       // BIO_new_mem_buf just creates a read-only view, so we don't need
       // to free it afterwards.
       kbio = BIO_new_mem_buf(var->data(), -1);
@@ -290,7 +293,7 @@ SSL_CTX* session::create_ssl_context() {
       if (rsa != NULL)
         CAF_RAISE_CAF_RAISE_ERROR("invalid private key");
       SSL_CTX_use_RSAPrivateKey(ctx, rsa);
-#else /* OPENSSL_VERSION_NUMBER < 0x10101000L */
+#else /* OPENSSL_VERSION_NUMBER < 0x30000000L */
       EVP_PKEY *pkey = nullptr;
       const char *format = "PEM";   // NULL for any format
       const char *structure = nullptr; // Any structure
@@ -311,7 +314,7 @@ SSL_CTX* session::create_ssl_context() {
       // Use the private key.
       SSL_CTX_use_PrivateKey(ctx, pkey);
       OSSL_DECODER_CTX_free(dctx);
-#endif /* OPENSSL_VERSION_NUMBER < 0x10101000L */
+#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L */
     }
     else if (!cfg.openssl_key.empty()
         && SSL_CTX_use_PrivateKey_file(ctx, cfg.openssl_key.c_str(),