Midnight Commander file association and execution

Set KDE file association in mc for all users.
Edit config file "/etc/mc/mc.ext"

For example we set association for video files:
**************************************************
### Video ###
........

include/video                                                                                                      
<------>Open=(kfmclient exec %f >/dev/null 2>&1 &)
**************************************************
Use this string for other application if need.

Examples for other ENV:
# for XFCE
Open=(exo-open %f >/dev/null 2>&1 &)
#for Gnome
Open=(gnome-open %f >/dev/null 2>&1 &)