Merged Rails 2.2 branch. Redmine now requires Rails 2.2.2.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2493 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/boot.rb

@@ -67,7 +67,7 @@ module Rails
 
     class << self
       def rubygems_version
-        Gem::RubyGemsVersion if defined? Gem::RubyGemsVersion
+        Gem::RubyGemsVersion rescue nil
       end
 
       def gem_version
@@ -82,14 +82,14 @@ module Rails
 
       def load_rubygems
         require 'rubygems'
-
-        unless rubygems_version >= '0.9.4'
-          $stderr.puts %(Rails requires RubyGems >= 0.9.4 (you have #{rubygems_version}). Please `gem update --system` and try again.)
+        min_version = '1.3.1'
+        unless rubygems_version >= min_version
+          $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.)
           exit 1
         end
 
       rescue LoadError
-        $stderr.puts %(Rails requires RubyGems >= 0.9.4. Please install RubyGems and try again: http://rubygems.rubyforge.org)
+        $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org)
         exit 1
       end