chore: generic fixes (#1187)

proxy/config.py

@@ -209,11 +209,11 @@ def parse_dc_ip_list(dc_ip_list: List[str]) -> Dict[int, str]:
         dc_s, ip_s = entry.split(':', 1)
         try:
             dc_n = int(dc_s)
-            _socket.inet_aton(ip_s)
+            _socket.inet_pton(_socket.AF_INET, ip_s)
         except (ValueError, OSError):
             err = ValueError(f"Invalid --dc-ip {entry!r}")
             err.entry = entry
             err.kind = "invalid"
-            raise err
+            raise err from None
         dc_redirects[dc_n] = ip_s
     return dc_redirects