Log Message:
Update ruby-unicorn to 4.6.2.

=== unicorn 4.6.2 - HTTP parser fix for Rainbows! / 2013-02-26 02:59 UTC

  This release fixes a bug in Unicorn::HttpParser#filter_body
  which affected some configurations of Rainbows!  There is
  also a minor size reduction in the DSO.

=== unicorn 4.6.1 - minor cleanups / 2013-02-21 08:38 UTC

  Unicorn::Const::UNICORN_VERSION is now auto-generated from
  GIT-VERSION-GEN and always correct.  Minor cleanups for
  hijacking.

=== unicorn 4.6.0 - hijacking support / 2013-02-06 11:23 UTC

  This pre-release adds hijacking support for Rack 1.5 users.
  See Rack documentation for more information about hijacking.
  There is also a new --no-default-middleware/-N option
  for the `unicorn' command to ignore RACK_ENV within unicorn
  thanks to Lin Jen-Shin.

  There are only documentation and test-portability updates
  since 4.6.0pre1, no code changes.

=== unicorn 4.6.0pre1 - hijacking support / 2013-01-29 21:05 UTC

  This pre-release adds hijacking support for Rack 1.5 users.
  See Rack documentation for more information about hijacking.
  There is also a new --no-default-middleware/-N option
  for the `unicorn' command to ignore RACK_ENV within unicorn.