extract method DRbObject.prepare_backtrace. add DRb.regist_server, remove_server, fetch_server. change server in thread variable if in-proc sesrver. [druby-ja:113] * lib/drb/gw.rb: ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8207 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e