Merge branch 'sd/init-template'

* sd/init-template:
  wrap-for-bin: do not export an empty GIT_TEMPLATE_DIR
  t/t0001-init.sh: add test for 'init with init.templatedir set'
  init: having keywords without value is not a global error.
  Add a "TEMPLATE DIRECTORY" section to git-init[1].
  Add `init.templatedir` configuration variable.

diff --cc Documentation/config.txt
Simple merge

diff --cc Documentation/git-clone.txt
Simple merge

diff --cc builtin/init-db.c
Simple merge