have logwatch_conf_filter replace any old filter with the same name, and move irc_log.sql to modules/

update TODO, partially update error.c, rename module_get to modules_get, update config.lua

implement logwatch_chan.c, logwatch_chan_msg, logwatch_on_error

implement logwatch_source names, and logwatch_chan

lua_irc is broken, as irc_chan_info::channel is set to a lua-stack allocated string...

implement logwatch_filter::format using str_format

implement str_format with tests

update logwatch_filter_apply

implement logwatch_on_line/logwatch_filter_apply, along with irc_*_NOTICE

...add str.c module to cmake

move test.c dump_str implemention into str.h str_quote, and improve it

fix up lua_module_conf/config_* enough so that logwatch_conf_filter works

comment fix :)

start implementing multiple args for lua_module_conf

implement logwatch_conf_filter such that it compiles and loads, but not yet tested