Reading the file /etc/resolv.conf that is linked to
/run/connman/resolv.conf is not possible for common users.
This changes add the setting of the directory /run/connman
that allows common applications to read that file.
To achieves this goal, that changes use the intended
tuning mechanism of systemd instead of using sed.
This is cleaner. Thus this as been adapted for bluez5 too.
Signed-off-by: José Bollo <firstname.lastname@example.org>