git-completion.zsh: define __gitcomp_file compatibility function

Commit fea16b47b60 (Fri Jan 11 19:48:43 2013, Manlio Perillo,
git-completion.bash: add support for path completion), introduced a new
__gitcomp_file function that uses the bash builtin "compgen". The
function was redefined for ZSH in the deprecated section of
git-completion.bash, but not in the new git-completion.zsh script.

As a result, users of git-completion.zsh trying to complete "git add
fo<tab>" get an error:

git add fo__gitcomp_file:8: command not found: compgen

This patch adds the redefinition and removes the error.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
gitweb/README: remove reference to git.kernel.org

git.kernel.org no longer uses gitweb but has switched to cgit.

Info about this can be found on: https://www.kernel.org/pelican.html
or simply by looking at http://git.kernel.org . This is change since
2013-03-01.

Signed-off-by: Fredrik Gustafsson <iveqy@iveqy.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'mh/maint-ceil-absolute' into maint

* mh/maint-ceil-absolute:
  Provide a mechanism to turn off symlink resolution in ceiling paths
Merge branch 'maint'

* maint:
  gitweb/README: remove reference to git.kernel.org
Merge branch 'mp/complete-paths'

* mp/complete-paths:
  git-completion.zsh: define __gitcomp_file compatibility function
Merge git://github.com/git-l10n/git-po

* 'master' of git://github.com/git-l10n/git-po:
  l10n: zh_CN.po: translate 1 new message
  l10n: de.po: translate 1 new message
  l10n: vi.po: Update translation (2009t0f0u)
  l10n: Update Swedish translation (2009t0f0u)
  l10n: git.pot: v1.8.2 round 4 (1 changed)
Git 1.8.2-rc3

Signed-off-by: Junio C Hamano <gitster@pobox.com>