Change the internal coding system from EUC-JP to UTF-8.
Convert source files to UTF-8 and deprecate plum.kanji.
Input/output files are all assumed to be in UTF-8.
This makes a good-bye to Perl < 5.8.1, including perl4.
plum/trunk/module/log/channel.plm plum/trunk/module/log/error.plm plum/trunk/module/log/userslist.plm plum/trunk/module/log/client.plm plum/trunk/module/log/topic.plm plum/trunk/module/log/recent.plm plum/trunk/module/log/daily.plm plum/trunk/module/log/mail.plm plum/trunk/module/log/server.plm plum/trunk/module/server/info.plm plum/trunk/module/server/kanji.plm plum/trunk/module/server/timeout.plm plum/trunk/module/auto/alias.plm plum/trunk/module/auto/package.plm plum/trunk/module/auto/reply.plm plum/trunk/module/auto/response.plm plum/trunk/module/auto/answer.plm plum/trunk/module/auto/random.plm plum/trunk/module/auto/cache.plm plum/trunk/module/auto/message.plm plum/trunk/module/auto/oper.plm plum/trunk/module/channel/join/connect.plm plum/trunk/module/channel/join/invite.plm plum/trunk/module/channel/join/kick.plm plum/trunk/module/channel/alias.plm plum/trunk/module/channel/mode/set.plm plum/trunk/module/channel/mode/oper/set.plm plum/trunk/module/channel/mode/oper/get.plm plum/trunk/module/channel/filter.plm plum/trunk/module/ctcp/clientinfo.plm plum/trunk/module/ctcp/finger.plm plum/trunk/module/ctcp/userinfo.plm plum/trunk/module/ctcp/ping.plm plum/trunk/module/ctcp/echo.plm plum/trunk/module/ctcp/time.plm plum/trunk/module/ctcp/comment.plm plum/trunk/module/ctcp/dcc/send.plm plum/trunk/module/ctcp/dcc/client.plm plum/trunk/module/ctcp/dcc/get.plm plum/trunk/module/ctcp/dcc/gate.plm plum/trunk/module/ctcp/dcc/nat.plm plum/trunk/module/ctcp/dcc/forward.plm plum/trunk/module/ctcp/dcc/cancel.plm plum/trunk/module/ctcp/version.plm plum/trunk/module/ctcp/part.plm plum/trunk/module/client/kanji.plm plum/trunk/module/client/topic.plm plum/trunk/module/sys/web.plm plum/trunk/module/sys/conf/load.plm plum/trunk/module/sys/conf/update.plm plum/trunk/module/sys/module/update.plm plum/trunk/module/sys/background.plm plum/trunk/module/sys/show.plm plum/trunk/module/sys/timer.plm plum/trunk/module/sys/dump.plm plum/trunk/module/sys/multicast.plm plum/trunk/module/user/away/client.plm plum/trunk/module/user/away/nick.plm plum/trunk/module/user/idle.plm plum/trunk/module/user/mode/set.plm plum/trunk/module/user/nick/client.plm plum/trunk/module/user/ignore.plm plum/trunk/plum