[PATCH 0/6] post-strbuf_getline cleanups

As promised, here are the "how about this on top" patches that came out of the discussion for the "strbuf_getline" series in:

  http://thread.gmane.org/gmane.comp.version-control.msysgit/21773/focus=284001

As I looked further at some of the option-parsing cleanups, I realized that some of them are more than cleanups; we're actually fixing bizarre behavior and segfaults.

  [1/6]: give "nbuf" strbuf a more meaningful name
  [2/6]: checkout-index: simplify "-z" option parsing
  [3/6]: checkout-index: handle "--no-prefix" option
  [4/6]: checkout-index: handle "--no-index" option
  [5/6]: checkout-index: disallow "--no-stage" option
  [6/6]: apply, ls-files: simplify "-z" parsing

-Peff