Windows Event Log, error output

Adding more Event Log support, and modifying the loggers so they return
errors in their operational functions.

logging/funcs_windows.go

@@ -22,6 +22,9 @@ import (
 	A pointer to a WinEventID struct may be specified for eventIDs to map extended logging levels (as Windows only supports three levels natively).
 	If it is nil, a default one (DefaultEventID) will be used.
 
+	logConfigFlags is the corresponding flag(s) OR'd for StdLogger.LogFlags / FileLogger.StdLogger.LogFlags if either is selected. See StdLogger.LogFlags and
+	https://pkg.go.dev/log#pkg-constants for details.
+
 	logPaths is an (optional) list of strings to use as paths to test for writing. If the file can be created/written to,
 	it will be used (assuming you have no higher-level loggers available).
 
@@ -32,13 +35,14 @@ import (
 	If you want to log to multiple Logger destinations at once (or want to log to an explicit Logger type),
 	use GetMultiLogger.
 */
-func GetLogger(enableDebug bool, source string, eventIDs *WinEventID, logPaths ...string) (logger Logger, err error) {
+func GetLogger(enableDebug bool, source string, eventIDs *WinEventID, logConfigFlags int, logPaths ...string) (logger Logger, err error) {
 
 	var logPath string
 	var logFlags bitmask.MaskBit
 	var exists bool
 	var success bool
 	var ckLogPaths []string
+	var prefix string
 
 	if strings.TrimSpace(source) == "" {
 		err = errors.New("invalid source for Windows logging")
@@ -94,6 +98,7 @@ func GetLogger(enableDebug bool, source string, eventIDs *WinEventID, logPaths .
 				StdLogger: StdLogger{
 					Prefix:      source,
 					EnableDebug: enableDebug,
+					LogFlags:    logConfigFlags,
 				},
 				Path: logPath,
 			}
@@ -101,13 +106,25 @@ func GetLogger(enableDebug bool, source string, eventIDs *WinEventID, logPaths .
 			logger = &StdLogger{
 				Prefix:      source,
 				EnableDebug: enableDebug,
+				LogFlags:    logConfigFlags,
 			}
 		}
 	}
 
-	logger.Setup()
+	if err = logger.Setup(); err != nil {
+		return
+	}
+	if source != "\x00" {
+		if err = logger.SetPrefix(source); err != nil {
+			return
+		}
+	}
 
-	logger.Info("logger initialized of type %T with source %v", logger, logger.GetPrefix())
+	if prefix, err = logger.GetPrefix(); err != nil {
+		return
+	}
+
+	logger.Debug("logger initialized of type %T with source %v", logger, prefix)
 
 	return