Log Message:
Update rails to 1.2.5.

Changes:

* Correct RAILS_GEM_VERSION regexp. Use =version gem requirement instead of
  ~>version so you don't get surprised by a beta gem in production. This
  change means upgrading to 1.2.5 will require a boot.rb upgrade.
* Move custom inflections example so available before route generation.
* Add a new rake task to aid debugging of named routes.
* use Gem.find_name instead of search when freezing gems. Prevent false
  positives for other gems with rails in the name. Closes #8729 [wselman]
* Fix syntax error in dispatcher than wrecked failsafe responses.
* Add Active Resource to rails:freeze:edge and drop Action Web Service.
* Give generate scaffold a more descriptive database message.  Closes #7316
* Canonicalize RAILS_ROOT by using File.expand_path on Windows, which doesn't
  have to worry about symlinks, and Pathname#realpath elsewhere, which
  respects symlinks in relative paths but is incompatible with Windows. #6755
  [Jeremy Kemper, trevor]