Log Message:
Release 4.0.42
--------------

 * [Nginx] Upgraded the preferred Nginx version to 1.6.0.
 * [Nginx] Fixed compatibility with Nginx 1.7.0.
 * There are now APT packages for Ubuntu 14.04. At the same time, packages
   for Ubuntu 13.10 have been abandoned.
 * Introduced a new command, `passenger-config build-native-support`, for
   ensuring that the native_support library for the current Ruby interpreter
   is built. This is useful in system provisioning scripts.
 * For security reasons, friendly error pages (those black/purple pages that shows
   the error message, backtrace and environment variable dump when an application
   fails to start) are now disabled by default when the application environment is
   set to 'staging' or 'production'. Fixes issue #1063.
 * Fixed some compilation warnings on Ubuntu 14.04.
 * Fixed some compatibility problems with Rake 10.2.0 and later.
   See [Rake issue 274](https://github.com/jimweirich/rake/issues/274).
 * Improved error handling in [Union Station](https://www.unionstationapp.com)
   support.
 * Data is now sent to Union Station on a more frequent basis, in order to make new
   data show up more quickly.
 * Information about the code revision is now sent to Union Station, which will be
   used in the upcoming deployment tracking feature in Union Station 2.