Merge branch 'maint'

* maint:
Do not use errno when pread() returns 0
git init: --bare/--shared overrides system/global config
git-push.txt: Describe --repo option in more detail
git rm: refresh index before up-to-date check
Fix a few typos in relnotes

diff --cc builtin-push.c
Simple merge

diff --cc index-pack.c
Simple merge