Add ansible header

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

roles/cli-utils/templates/tmux.conf.j2

@@ -1,8 +1,17 @@
+{{ ansible_header | comment }}
+
 unbind r
 bind r source-file ~/.tmux.conf
 
 set -g mouse on
 
+## set the default TERM
+set -g default-terminal screen
+
+## update the TERM variable of terminal emulator when creating a new session or attaching a existing session
+set -g update-environment 'DISPLAY SSH_ASKPASS SSH_AGENT_PID SSH_CONNECTION WINDOWID XAUTHORITY TERM'
+## determine if we should enable 256-colour support
+if "[[ ${TERM} =~ 256color || ${TERM} == fbterm ]]" 'set -g default-terminal screen-256color'
 
 # use the vim motion keys to move between panes
 bind h select-pane -L