Add a screen session for tls logs

When tls is enabled, we aren't bringing the logs to the forefront,
which makes it hard to debug when things go wrong. This does that.

Change-Id: I7c6c7e324e16da6b9bfa44f4bad17401ca4ed7e3
diff --git a/stack.sh b/stack.sh
index 9aa770f..5170d1b 100755
--- a/stack.sh
+++ b/stack.sh
@@ -993,6 +993,10 @@
     fi
     screen -r $SCREEN_NAME -X hardstatus alwayslastline "$SCREEN_HARDSTATUS"
     screen -r $SCREEN_NAME -X setenv PROMPT_COMMAND /bin/true
+
+    if is_service_enabled tls-proxy; then
+        follow_tls_proxy
+    fi
 fi
 
 # Clear ``screenrc`` file