Merge #10998: Fix upgrade cancel warnings

861f9a2 Skip remainder of init if upgrade is cancelled (Matt Corallo)

Pull request description:

  Based on #10919.
  Without this, if you cancel upgrade, you get a needless error:
  ERROR: VerifyDB(): *** irrecoverable inconsistency in block data at

Tree-SHA512: aa47665682c6605ada376f1c100ce17cf8c4312427929eb2e75306f2199b47cbcdb4e0d98d5efcfefff03947b2c0fcbd3aab487a4ed14d50607df685c91a03d0

src/txdb.cpp

@@ -422,5 +422,5 @@ bool CCoinsViewDB::Upgrade() {
     db.CompactRange({DB_COINS, uint256()}, key);
     uiInterface.SetProgressBreakAction(std::function<void(void)>());
     LogPrintf("[%s].\n", ShutdownRequested() ? "CANCELLED" : "DONE");
-    return true;
+    return !ShutdownRequested();
 }