Fix mojibake in DX cluster and RBN spot comments where the source uses UTF-8

core/utils.py

@@ -156,3 +156,13 @@ def get_callsign_object_from_pyhamtools_callinfo(callsign, callinfo):
     except (KeyError, ValueError):
         # Unknown callsign, can't look anything up, return a Callsign object with basic data so that gets cached
         return Callsign(call=callsign)
+
+
+def decode_telnet_bytes(data: bytes) -> str:
+    """Decode a line of text received from a telnet connection, which might be UTF-8 or Latin-1 depending on the
+    whims of the server owner."""
+
+    try:
+        return data.decode("utf-8")
+    except UnicodeDecodeError:
+        return data.decode("latin-1")