[PATCH 0/4 v2] push.default upcomming change

OK, so this v2 is not supposed to be a draft anymore. It has documentation (while I was there, I added PATCH 1/4 thas tries to document better the existing modes), and I removed the hunks that came here after a broken merge resolution.

This is based on next, it at least requires 135dade that creates t5528.

Clemens Buchacher (1):
  t5570: use explicit push refspec

Matthieu Moy (3):
  Documentation: explain push.default option a bit more
  push: introduce new push.default mode "simple"
  push: start warning upcoming default change for push.default

 Documentation/config.txt |   20 +++++++++++++--
 builtin/push.c           |   55 ++++++++++++++++++++++++++++++++++++++--
 cache.h                  |    1 +
 config.c                 |    4 ++-
 t/t5528-push-default.sh  |   63 +++++++++++++++++++++++++++++++++++++++++++---
 t/t5570-git-daemon.sh    |   30 +++++++++++-----------
 6 files changed, 149 insertions(+), 24 deletions(-)