ext/md5/md5.txt.jp.
* ext/sha1/sha1.txt: revise the copyright info and reduce the
difference from ext/md5/md5.txt.
* ext/md5/md5.txt: reduce the difference from ext/sha1/sha1.txt.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1410 b2dd03c8-39d4-4d8f-98ff-823fe69b080e