Modernize the $LESS value

From Ubuntu side, matching with git help or $MANPAGER use, plus -Q.

modified:   .bash_env
Enlerge the frames of ediff/emerge

As emacsclient cannot request (fullscreen . maximized) frames, we make
do by making a large frame that fits in my 1600x900 screen with some
fringe to spare. The idea is that most uses of ediff/emerge won't
require the distraction of maximizing.

modified:   cmd/ediff
modified:   cmd/emerge