Fix gnome-terminal detection for 3.14

[Daniel Hahler]

gnome-terminal has dropped setting $COLORTERM in 3.12.0-67-g1d5c1b6.

The $COLORTERM check in usr/bin/byobu.in might need to get adjusted - if it's required to detect gnome-terminal explicitly.

111: if [ "$(tput colors 2>/dev/null || echo 0)" = "256" ] || [ "$COLORTERM" = "gnome-terminal" ] || [ "$TERM" = "xterm" ] || [ "$TERM" = "xterm-256color" ]; then

I am using the following currently (in another context, zsh):

    [[ "$COLORTERM" == "gnome-terminal" ]] || [[ ${$(</proc/$PPID/cmdline):t} == gnome-terminal* ]]

[Dustin Kirkland  (kirkland)]

Thanks for the info. I'm not seeing any negative effects of this change yet.