[crossfire] Message handling changes

[Nicolas Weeger]

Hello.


I committed two changes to the lib/messages file and handling:

- messages have a (relative) chance, like other things like items on treasure 
list, so we can alter message frequency, or have messages which don't appear 
in random scrolls (can be given from quests and such)

- messages are (optionally, depending on the message) managed through the 
'knowledge' system, so a player will keep track of slightly more information


Check the top of lib/messages and ask me if not clear.




Regards

Nicolas
-- 
Mon p'tit coin du web - http://nicolas.weeger.org
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