Merge branch 'maint'

* maint:
pager: default to LESS=FRSX not LESS=FRS
Make prune also run prune-packed
git-vc: better installation instructions
gitweb: Do not esc_html $basedir argument to git_print_tree_entry
gitweb: Whitespace cleanup - tabs are for indent, spaces are for align (2)
Fix usagestring for git-branch
git-merge: show usage if run without arguments

diff --cc git-merge.sh
Simple merge

diff --cc gitweb/gitweb.perl
Simple merge