Allows changing of bot configuration values without needing to restart
bot instance or needing to edit pbot.pl script.
Registry will initially be populated with default values from pbot.pl,
but if a registry file exists then the registry values will take
precedence over the pbot.pl values. For instance, if you regset the
bot trigger to '%' then the trigger will be '%' even if pbot.pl has '!'
or something else explicitly set.
Some registry items can have trigger hooks associated with them. For
instance, the irc->botnick registry entry has a change_botnick_trigger
associated with it which changes the IRC nick on the server when a new
value is set via regset/regadd.
Tons of other fixes and improvements throughout.
The nick field is now optional and Getopt::Long is used to accept targeted
options for channel/history, allowing recalls by text/channel for any nick
which is useful when you know what text the message contained but not who
said it.
Added MessageHistory.pm and MessageHistory_SQLite.pm. May eventually port
and add MessageHistory_Hashtable.pm as was done with Quotegrabs, but this is
not particularly high on the todo list.
Antiflood.pm has been updated to use the new MessageHistory API.
The `recall` command has been moved from Quotegrabs into MessageHistory. It
also now has the ability to ignore messages containing the recall command
itself, for improved usability.
Likewise, the `grab` command will now ignore previous `grab` commands when
grabbing by regex in order to prevent accidentally grabbing previous grab
attempts.
The `join` and `part` commands have been improved to accept multiple channels,
and `part` will use the current channel if none is provided.
