* lib/rubygems/installer.rb:  Untaint string when checking output
	  for $SAFE=1

	* lib/rubygems/specification.rb:  Keep previously loaded specs as
	  active.  This prevents double loading when refreshing the gem list.
	* test/rubygems/test_gem.rb:  Test for above

	* lib/rubygems.rb:  Bump version to 2.0.0.rc.2


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38855 b2dd03c8-39d4-4d8f-98ff-823fe69b080e