i18n fixes

proxy/config.py

@@ -200,13 +200,19 @@ def parse_dc_ip_list(dc_ip_list: List[str]) -> Dict[int, str]:
     dc_redirects: Dict[int, str] = {}
     for entry in dc_ip_list:
         if ':' not in entry:
-            raise ValueError(
+            err = ValueError(
                 f"Invalid --dc-ip format {entry!r}, expected DC:IP")
+            err.entry = entry
+            err.kind = "format"
+            raise err
         dc_s, ip_s = entry.split(':', 1)
         try:
             dc_n = int(dc_s)
             _socket.inet_aton(ip_s)
         except (ValueError, OSError):
-            raise ValueError(f"Invalid --dc-ip {entry!r}")
+            err = ValueError(f"Invalid --dc-ip {entry!r}")
+            err.entry = entry
+            err.kind = "invalid"
+            raise err
         dc_redirects[dc_n] = ip_s
     return dc_redirects