Log Message:
Changes 1.7.4.1:
* On Windows platform, the codepath to spawn a new child process forgot
  to first flush the output buffer.
* "git bundle" did not use OFS_DELTA encoding, making its output a few
  per-cent larger than necessarily.
* The option to tell "git clone" to recurse into the submodules was
  misspelled with an underscore "--recurse_submodules".
* "git diff --cached HEAD" before the first commit does what an end user
  would expect (namely, show what would be committed without further "git
  add").
* "git fast-import" didn't accept the command to ask for \ 
"notes" feature
  to be present in its input stream, even though it was capable of the
  feature.
* "git fsck" gave up scanning loose object files in directories with
  garbage files.