Merge branch 'master' of git://repo.or.cz/git/fastimport into maint

Merge branch 'master' of git://repo.or.cz/git/fastimport into maint

* 'master' of git://repo.or.cz/git/fastimport:
  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