Merge bitcoin/bitcoin#31239: test: clarify log messages when handling SOCKS5 proxy connections

99d9a09 test: clarify log messages when handling SOCKS5 proxy connections (Vasil Dimov)

Pull request description:

  Clarify log messages when handling SOCKS5 proxy connections.

  Suggested in bitcoin/bitcoin#29420 (comment)

ACKs for top commit:
  mzumsande:
    Code Review ACK 99d9a09
  tdb3:
    code review ACK 99d9a09

Tree-SHA512: 06bc0e63fbc9fdd8144a161d65d02e6c99565960064e65782b9b4b2fdfdf18539a1cd9513e17a911eef1506525e411e8422b7b805ce4c2392fcca6620112e172

Author: fanquake

test/functional/test_framework/socks5.py

@@ -183,9 +183,9 @@ def handle(self):
                     with socket.create_connection((dest["actual_to_addr"], dest["actual_to_port"])) as conn_to:
                         forward_sockets(self.conn, conn_to)
                 else:
-                    logger.debug(f"Closing connection to {requested_to}: the destinations factory returned None")
+                    logger.debug(f"Can't serve the connection to {requested_to}: the destinations factory returned None")
             else:
-                logger.debug(f"Closing connection to {requested_to}: no destinations factory")
+                logger.debug(f"Can't serve the connection to {requested_to}: no destinations factory")
 
             # Fall through to disconnect
         except Exception as e:
@@ -194,6 +194,8 @@ def handle(self):
         finally:
             if not self.serv.keep_alive:
                 self.conn.close()
+            else:
+                logger.debug(f"Keeping client connection alive")
 
 class Socks5Server():
     def __init__(self, conf):