Separate the window sentence from the wrapped error so a bad certificate file is not reported as a key mismatch.

Co-authored-by: Cursor <cursoragent@cursor.com>

station/log.go

@@ -93,6 +93,10 @@ func (s *Station) noteDownLocked(now time.Time, dial bool) {
 }
 
 func (s *Station) endFatal(msg string, log bool) {
+	s.endFatalCause(msg, nil, log)
+}
+
+func (s *Station) endFatalCause(msg string, cause error, log bool) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	if s.fatal != "" {
@@ -107,7 +111,11 @@ func (s *Station) endFatal(msg string, log bool) {
 	if log {
 		s.up = false
 		s.outage = true
-		s.writeLog(now, oneLine(msg))
+		line := oneLine(msg)
+		if cause != nil {
+			line += ": " + oneLine(cause.Error())
+		}
+		s.writeLog(now, line)
 	}
 	s.publish()
 }