feat: Optimization of spots not to miss any

internal/cluster/cluster.go

@@ -534,8 +534,14 @@ func (s *session) emitLine(text string, sent bool) {
 // ---------- parsing ----------
 
 // spotRE matches "DX de SPOTTER: FREQ DXCALL COMMENT TIME [LOC]".
+//
+// The spotter→freq separator is (?::\s*|\s+): a colon followed by ANY number of
+// spaces (including ZERO), or one-or-more spaces with no colon. Some RBN skimmer
+// nodes glue the frequency straight onto the colon — "DX de DL1HWS-3-#:14024.0 …"
+// — which the old ":?\s+" (colon then a REQUIRED space) rejected, dropping every
+// spot from those nodes.
 var spotRE = regexp.MustCompile(
-	`^\s*DX\s+de\s+([A-Z0-9/#\-]+):?\s+(\d+\.?\d*)\s+([A-Z0-9/]+)\s+(.*?)\s+(\d{4}Z?)(?:\s+([A-R]{2}\d{2}(?:[A-X]{2})?))?\s*$`,
+	`^\s*DX\s+de\s+([A-Z0-9/#\-]+)(?::\s*|\s+)(\d+\.?\d*)\s+([A-Z0-9/]+)\s+(.*?)\s+(\d{4}Z?)(?:\s+([A-R]{2}\d{2}(?:[A-X]{2})?))?\s*$`,
 )
 
 // Pacing for the per-server init commands.