Merge tag 'v2.7.0'

Merge tag 'v2.7.0'

Git 2.7

* tag 'v2.7.0': (539 commits)
  Git 2.7
  Git 2.6.5
  l10n: de.po: translate 68 new messages
  l10n: de.po: improve some translations
  Git 2.7-rc3
  l10n: ru.po: update Russian translation
  l10n: Updated Bulgarian translation of git (2477t,0f,0u)
  l10n: ca.po: update translation
  l10n: zh_CN: for git v2.7.0 l10n round 2
  l10n: sv.po: Update Swedish translation (2477t0f0u)
  l10n: sv: Fix bad translation
  l10n: fr.po v2.7.0 round 2 (2477t)
  Git 2.7-rc2
  push: don't mark options of recurse-submodules for translation
  l10n: git.pot: v2.7.0 round 2 (2 new, 2 removed)
  t1401: test reflog creation for git-symbolic-ref
  symbolic-ref: propagate error code from create_symref()
  git-p4: reduce number of server queries for fetches
  git-p4: support multiple depot paths in p4 submit
  Update release notes to 2.7
  ...