add check for file to do screen always

bashrc.d/ZZZ_always_screen

@@ -1,8 +1,8 @@
 #!/bin/bash
 # Create a Screen session everytime, unless you don't want
-
-screen_cmd=$(which screen)
-if [ -n "${screen_cmd}" ]; then
+if [ -e ~/.always_screen ]; then
+    screen_cmd=$(which screen)
+    if [ -n "${screen_cmd}" ]; then
         if [ -n "${STY}" ]; then
             session_name="${STY//[0-9]*\./}"
             echo "This is screen session '${session_name}'"
@@ -30,6 +30,7 @@ if [ -n "${screen_cmd}" ]; then
                 echo "Ok, I'll leave you alone without a session..."
             fi
         fi
-else
+    else
         echo "Screen is not installed. Install it so always_screen in your bashrc will work."
+    fi
 fi