[PATCH 0/4] Redoing the "add -u" migration plan

[Junio C Hamano <gitster@pobox.com>]

So here is the new migration plan to make "add -u" without pathspec to
default to the tree wide operation at 1.8.0 boundary.

The first patch is more or less the same as the "heads-up" version I sent
earlier to implement the magic ":/" pathspec at a wrong level as a hack,
but with some documentation updates.

It should apply on top of a91df69 (the parent of the first commit in the
"jc/add-u-migration" series).  Then merge the 33c33ca (the first commit in
the "jc/add-u-migration" series) to the result, and then apply the
remainder of this series.

The second patch gets rid of treewideupdate configuration variable, as we
no longer rely on user preference for this migration plan, and rewords the
warning message.  I did it this way only because the first commit in the
old series is already in 'next'; I will redo the series after 1.7.5 ships
so that we do not have to have this patch, nor "a configuration appears
and then disappears".

The third (step 2) patch is what should happen at 1.8.0 boundary by
flipping the default, but still keeps the warning for people who missed
the late 1.7.X series.

The last (step 3) patch is to remove the warning long after 1.8.0 boundary
when everybody got used to the new behaviour.

Junio C Hamano (4):
  magic pathspec: add tentative ":/path/from/top/level" pathspec support
  add -u: get rid of "treewideupdate" configuration
  add: make "add -u/-A" update full tree without pathspec (step 2)
  add: make "add -u/-A" update full tree without pathspec (step 3)