log: Log VerifyDB Progress over multiple lines

This allows to log a timestamp for each entry,
and avoids potential interference with other
threads that could log concurrently.

Author: mzumsande

src/validation.cpp

@@ -4082,15 +4082,15 @@ bool CVerifyDB::VerifyDB(
     BlockValidationState state;
     int reportDone = 0;
     bool skipped_l3_checks{false};
-    LogPrintf("[0%%]..."); /* Continued */
+    LogPrintf("Verification progress: 0%%\n");
 
     const bool is_snapshot_cs{!chainstate.m_from_snapshot_blockhash};
 
     for (pindex = chainstate.m_chain.Tip(); pindex && pindex->pprev; pindex = pindex->pprev) {
         const int percentageDone = std::max(1, std::min(99, (int)(((double)(chainstate.m_chain.Height() - pindex->nHeight)) / (double)nCheckDepth * (nCheckLevel >= 4 ? 50 : 100))));
         if (reportDone < percentageDone / 10) {
             // report every 10% step
-            LogPrintf("[%d%%]...", percentageDone); /* Continued */
+            LogPrintf("Verification progress: %d%%\n", percentageDone);
             reportDone = percentageDone / 10;
         }
         uiInterface.ShowProgress(_("Verifying blocks…").translated, percentageDone, false);
@@ -4159,7 +4159,7 @@ bool CVerifyDB::VerifyDB(
             const int percentageDone = std::max(1, std::min(99, 100 - (int)(((double)(chainstate.m_chain.Height() - pindex->nHeight)) / (double)nCheckDepth * 50)));
             if (reportDone < percentageDone / 10) {
                 // report every 10% step
-                LogPrintf("[%d%%]...", percentageDone); /* Continued */
+                LogPrintf("Verification progress: %d%%\n", percentageDone);
                 reportDone = percentageDone / 10;
             }
             uiInterface.ShowProgress(_("Verifying blocks…").translated, percentageDone, false);
@@ -4174,8 +4174,7 @@ bool CVerifyDB::VerifyDB(
         }
     }
 
-    LogPrintf("[DONE].\n");
-    LogPrintf("No coin database inconsistencies in last %i blocks (%i transactions)\n", block_count, nGoodTransactions);
+    LogPrintf("Verification: No coin database inconsistencies in last %i blocks (%i transactions)\n", block_count, nGoodTransactions);
 
     return true;
 }