* ext/digest/lib/md5.rb (MD5::new, MD5::md5): Do not modify
  Digest::MD5.

* ext/digest/lib/sha1.rb (SHA1::new, SHA1::sha1): Ditto.

* lib/shell/process-controller.rb: fix thread synchronization
  problem for [ruby-dev:30477].

* ext/digest/lib/md5.rb (MD5::new, MD5::md5): Catch up with
  Digest's API changes; noted by: Kazuhiro Yoshida <moriq AT
  moriq.com> in [ruby-dev:30500].

* ext/digest/lib/sha1.rb (SHA1::new, SHA1::sha1): Ditto.
	
* time.c (time_to_s): Back out the format changes; discussed
  in [ruby-dev:30495].

* ext/tk/sample/irbtkw.rbw: fails to exit process.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@12008 b2dd03c8-39d4-4d8f-98ff-823fe69b080e