Fix passsite in split mode

We should identify conn user before setting dst up in split mode.
Because in split mode dst setup also sets src up too, which tries to
apply passsite rules and switch to passthrough mode. But since user
identification has not run yet, we don't know the user owner of the
conn, which fails passsite rules.

src/protopassthrough.c

@@ -254,6 +254,13 @@ protopassthrough_bev_eventcb_connected_srvdst(struct bufferevent *bev, pxy_conn_
 {
 	log_finest("ENTER");
 
+#ifndef WITHOUT_USERAUTH
+	pxy_userauth(ctx);
+	if (ctx->term || ctx->enomem) {
+		return;
+	}
+#endif /* !WITHOUT_USERAUTH */
+
 	ctx->connected = 1;
 	bufferevent_enable(bev, EV_READ|EV_WRITE);
 
@@ -261,12 +268,6 @@ protopassthrough_bev_eventcb_connected_srvdst(struct bufferevent *bev, pxy_conn_
 	if (!ctx->src.bev && protopassthrough_enable_src(ctx) == -1) {
 		return;
 	}
-
-#ifndef WITHOUT_USERAUTH
-	if (!ctx->term && !ctx->enomem) {
-		pxy_userauth(ctx);
-	}
-#endif /* !WITHOUT_USERAUTH */
 }
 
 static void NONNULL(1,2)

src/prototcp.c

@@ -509,6 +509,13 @@ prototcp_bev_eventcb_connected_srvdst(UNUSED struct bufferevent *bev, pxy_conn_c
 {
 	log_finest("ENTER");
 
+#ifndef WITHOUT_USERAUTH
+	pxy_userauth(ctx);
+	if (ctx->term || ctx->enomem) {
+		return;
+	}
+#endif /* !WITHOUT_USERAUTH */
+
 	if (prototcp_setup_dst(ctx) == -1) {
 		return;
 	}
@@ -521,12 +528,6 @@ prototcp_bev_eventcb_connected_srvdst(UNUSED struct bufferevent *bev, pxy_conn_c
 			return;
 		}
 	}
-
-#ifndef WITHOUT_USERAUTH
-	if (!ctx->term && !ctx->enomem) {
-		pxy_userauth(ctx);
-	}
-#endif /* !WITHOUT_USERAUTH */
 }
 
 void