[gnome-terminal] client: Add more env vars not to forward

[Christian Persch <chpe src gnome org>]

commit 62a2c7105a27325180bbeb0d0d6ba072b621d6ee
Author: Christian Persch <chpe src gnome org>
Date:   Sat Jul 31 14:56:25 2021 +0200

    client: Add more env vars not to forward

 src/terminal-client-utils.cc | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/terminal-client-utils.cc b/src/terminal-client-utils.cc
index 122ea3b8..1b1e2917 100644
--- a/src/terminal-client-utils.cc
+++ b/src/terminal-client-utils.cc
@@ -128,6 +128,7 @@ terminal_client_get_environment_filters (void)
     "REMOTE_ADDR",
     "REMOTE_PORT",
     "SERVICE_RESULT",
+    "SHLVL",
     "TERM",
     "VTE_VERSION",
     "WATCHDOG_PID",