Merge #17325: log: Fix log message for -par=1

8a0ca5e log: Fix log message for -par=1 (Hennadii Stepanov)

Pull request description:

  Fix #17139

ACKs for top commit:
  jnewbery:
    Tested ACK 8a0ca5e
  laanwj:
    ACK 8a0ca5e

Tree-SHA512: 09f5416c00cd3e4f85cd9040267dc825d5c5623f8903e9d2373013686dce7f6b3ba573648787adc1d58e6f1d5012e26c78700d585273d4b508cb25312b3fa06b

Author: laanwj

src/init.cpp

@@ -1256,7 +1256,7 @@ bool AppInitMain(NodeContext& node)
     InitSignatureCache();
     InitScriptExecutionCache();
 
-    LogPrintf("Using %u threads for script verification\n", nScriptCheckThreads);
+    LogPrintf("Script verification uses %d additional threads\n", std::max(nScriptCheckThreads - 1, 0));
     if (nScriptCheckThreads) {
         for (int i=0; i<nScriptCheckThreads-1; i++)
             threadGroup.create_thread([i]() { return ThreadScriptCheck(i); });