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

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

* 'master' of git://repo.or.cz/git/fastimport: (260 commits)
  Avoid src:dst syntax as default bash completion for git push
  Make it possible to specify the HEAD for the internal findUpstreamBranchPoint function.
  Added git-p4 branches command that shows the mapping of perforce depot paths to imported git branches.
  Warn about conflicting p4 branch mappings and use the first one found.
  Fix the branch mapping detection to be independent from the order of the "p4 branches" output.
  git-p4 fails when cloning a p4 depo.
  Fix initial multi-branch import.
  Only use double quotes on Windows
  Fix git-p4 rebase to detect the correct upstream branch instead of unconditionally
  Moved the code from git-p4 submit to figure out the upstream branch point
  git-p4 submit: Fix missing quotes around p4 commands to make them work with spaces in filenames
  Mention remotes/p4/master also in the documentation.
  Provide some information for single branch imports where the commits go
  git-p4: check for existence of repo dir before trying to create
  Write out the options tag in the log message of imports only if we actually have
  Fix support for explicit disabling of syncing with the origin
  Fix depot-paths encoding for multi-path imports (don't split up //depot/path/foo)
  Fix project name guessing
  Fix updating/creating remotes/p4/* heads from origin/p4/*
  Fixed the check to make sure to exclude the HEAD symbolic refs when updating
  ...