add check for file to do screen always

bashrc.d/ZZZ_always_screen

@@ -1,6 +1,6 @@
 #!/bin/bash
 # Create a Screen session everytime, unless you don't want
-
+if [ -e ~/.always_screen ]; then
     screen_cmd=$(which screen)
     if [ -n "${screen_cmd}" ]; then
         if [ -n "${STY}" ]; then
@@ -33,3 +33,4 @@ if [ -n "${screen_cmd}" ]; then
     else
         echo "Screen is not installed. Install it so always_screen in your bashrc will work."
     fi
+fi