Fix OpenSSL 3 and fold-expression warning regressions

src/bignum.h

@@ -11,6 +11,7 @@
 #include "version.h"
 
 #include <openssl/bn.h>
+#include <openssl/opensslv.h>
 
 #include <algorithm>
 #include <stdexcept>
@@ -541,7 +542,14 @@ public:
     */
     bool isPrime(const int checks=BN_prime_checks) const {
         CAutoBN_CTX pctx;
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
         int ret = BN_is_prime_ex(pbn, checks, pctx, nullptr);
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+#pragma GCC diagnostic pop
+#endif
         if(ret < 0){
             throw bignum_error("CBigNum::isPrime :BN_is_prime_ex");
         }

src/net.h

@@ -530,7 +530,8 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1;
-            (ssSend << ... << args);
+            using swallow = int[];
+            (void)swallow{0, ((void)(ssSend << args), 0)...};
             EndMessage();
         }
         catch (...)

src/util.h

@@ -601,7 +601,9 @@ inline uint160 Hash160(const std::vector<unsigned char>& vch)
     uint256 hash1;
     SHA256(&vch[0], vch.size(), (unsigned char*)&hash1);
     uint160 hash2;
+    TRI_OPENSSL_SUPPRESS_DEPRECATED_BEGIN
     RIPEMD160((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
+    TRI_OPENSSL_SUPPRESS_DEPRECATED_END
     return hash2;
 }