scripted-diff: Convert 11 enums into scoped enums (C++11)

-BEGIN VERIFY SCRIPT-

sed -i 's/enum DBErrors/enum class DBErrors/g' src/wallet/walletdb.h
git grep -l DB_ | xargs sed -i 's/DB_\(LOAD_OK\|CORRUPT\|NONCRITICAL_ERROR\|TOO_NEW\|LOAD_FAIL\|NEED_REWRITE\)/DBErrors::\1/g'
sed -i 's/^    DBErrors::/    /g' src/wallet/walletdb.h

sed -i 's/enum VerifyResult/enum class VerifyResult/g' src/wallet/db.h
sed -i 's/\(VERIFY_OK\|RECOVER_OK\|RECOVER_FAIL\)/VerifyResult::\1/g' src/wallet/db.cpp

sed -i 's/enum ThresholdState/enum class ThresholdState/g' src/versionbits.h
git grep -l THRESHOLD_ | xargs sed -i 's/THRESHOLD_\(DEFINED\|STARTED\|LOCKED_IN\|ACTIVE\|FAILED\)/ThresholdState::\1/g'
sed -i 's/^    ThresholdState::/    /g' src/versionbits.h

sed -i 's/enum SigVersion/enum class SigVersion/g' src/script/interpreter.h
git grep -l SIGVERSION_ | xargs sed -i 's/SIGVERSION_\(BASE\|WITNESS_V0\)/SigVersion::\1/g'
sed -i 's/^    SigVersion::/    /g' src/script/interpreter.h

sed -i 's/enum RetFormat {/enum class RetFormat {/g' src/rest.cpp
sed -i 's/RF_\(UNDEF\|BINARY\|HEX\|JSON\)/RetFormat::\1/g' src/rest.cpp
sed -i 's/^    RetFormat::/    /g' src/rest.cpp

sed -i 's/enum HelpMessageMode {/enum class HelpMessageMode {/g' src/init.h
git grep -l HMM_ | xargs sed -i 's/HMM_BITCOIN/HelpMessageMode::BITCOIN/g'
sed -i 's/^    HelpMessageMode::/    /g' src/init.h

sed -i 's/enum FeeEstimateHorizon/enum class FeeEstimateHorizon/g' src/policy/fees.h

sed -i 's/enum RBFTransactionState/enum class RBFTransactionState/g' src/policy/rbf.h
git grep -l RBF_ | xargs sed -i 's/RBF_TRANSACTIONSTATE_\(UNKNOWN\|REPLACEABLE_BIP125\|FINAL\)/RBFTransactionState::\1/g'
sed -i 's/^    RBFTransactionState::/    /g' src/policy/rbf.h

sed -i 's/enum BlockSource {/enum class BlockSource {/g' src/qt/clientmodel.h
git grep -l BLOCK_SOURCE_ | xargs sed -i 's/BLOCK_SOURCE_\(NONE\|REINDEX\|DISK\|NETWORK\)/BlockSource::\1/g'
sed -i 's/^    BlockSource::/    /g' src/qt/clientmodel.h

sed -i 's/enum FlushStateMode {/enum class FlushStateMode {/g' src/validation.cpp
sed -i 's/FLUSH_STATE_\(NONE\|IF_NEEDED\|PERIODIC\|ALWAYS\)/FlushStateMode::\1/g' src/validation.cpp
sed -i 's/^    FlushStateMode::/    /g' src/validation.cpp

sed -i 's/enum WitnessMode {/enum class WitnessMode {/g' src/test/script_tests.cpp
sed -i 's/WITNESS_\(NONE\|PKH\|SH\)/WitnessMode::\1/g' src/test/script_tests.cpp
sed -i 's/^    WitnessMode::/    /g' src/test/script_tests.cpp

-END VERIFY SCRIPT-

src/wallet/db.cpp

@@ -235,13 +235,13 @@ CDBEnv::VerifyResult CDBEnv::Verify(const std::string& strFile, recoverFunc_type
     Db db(dbenv.get(), 0);
     int result = db.verify(strFile.c_str(), nullptr, nullptr, 0);
     if (result == 0)
-        return VERIFY_OK;
+        return VerifyResult::VERIFY_OK;
     else if (recoverFunc == nullptr)
-        return RECOVER_FAIL;
+        return VerifyResult::RECOVER_FAIL;
 
     // Try to recover:
     bool fRecovered = (*recoverFunc)(fs::path(strPath) / strFile, out_backup_filename);
-    return (fRecovered ? RECOVER_OK : RECOVER_FAIL);
+    return (fRecovered ? VerifyResult::RECOVER_OK : VerifyResult::RECOVER_FAIL);
 }
 
 bool CDB::Recover(const fs::path& file_path, void *callbackDataIn, bool (*recoverKVcallback)(void* callbackData, CDataStream ssKey, CDataStream ssValue), std::string& newFilename)
@@ -347,7 +347,7 @@ bool CDB::VerifyDatabaseFile(const fs::path& file_path, std::string& warningStr,
     {
         std::string backup_filename;
         CDBEnv::VerifyResult r = env->Verify(walletFile, recoverFunc, backup_filename);
-        if (r == CDBEnv::RECOVER_OK)
+        if (r == CDBEnv::VerifyResult::RECOVER_OK)
         {
             warningStr = strprintf(_("Warning: Wallet file corrupt, data salvaged!"
                                      " Original %s saved as %s in %s; if"
@@ -355,7 +355,7 @@ bool CDB::VerifyDatabaseFile(const fs::path& file_path, std::string& warningStr,
                                      " restore from a backup."),
                                    walletFile, backup_filename, walletDir);
         }
-        if (r == CDBEnv::RECOVER_FAIL)
+        if (r == CDBEnv::VerifyResult::RECOVER_FAIL)
         {
             errorStr = strprintf(_("%s corrupt, salvage failed"), walletFile);
             return false;