server : fix hardcoded proxy connection timeout in router mode (ggml-org#18760) (ggml-org#22003)

Fixes: ggml-org#18760

Co-authored-by: Christian <christian@example.com>

Author: xris99

tools/server/server-models.cpp

@@ -1147,7 +1147,7 @@ server_http_proxy::server_http_proxy(
 
     // setup Client
     cli->set_follow_location(true);
-    cli->set_connection_timeout(5, 0); // 5 seconds
+    cli->set_connection_timeout(timeout_read, 0); // use --timeout value instead of hardcoded 5 s
     cli->set_write_timeout(timeout_read, 0); // reversed for cli (client) vs srv (server)
     cli->set_read_timeout(timeout_write, 0);
     this->status = 500; // to be overwritten upon response