Merge branch 'maint'

Merge branch 'maint'

* maint:
  fix memory leak in parse_object when check_sha1_signature fails
  name-rev: tolerate clock skew in committer dates
  Update bash completion for git-config options
  Teach bash completion about recent log long options
  Teach bash completion about 'git remote update'
  Update bash completion header documentation
  Remove a duplicate --not option in bash completion
  Teach bash completion about git-shortlog
  Hide the plumbing diff-{files,index,tree} from bash completion
  Update bash completion to ignore some more plumbing commands