Merge branch 'jn/pager-lv-default-env'

Just like we give a reasonable default for "less" via the LESS
environment variable, specify a reasonable default for "lv" via the
"LV" environment variable when spawning the pager.

* jn/pager-lv-default-env:
pager: set LV=-c alongside LESS=FRSX

diff --cc Documentation/config.txt
Simple merge

diff --cc git-sh-setup.sh
Simple merge

diff --cc pager.c
Simple merge