implement modules:path for config.lua

implement lua_modules__gc in case the modules global gets lost

implement lua_module_unload and lua_module_gc to release references

fix irc_log_unload/irc_log_destroy for cases where no config options were set

fix refcount semantics for module_load and have module_unload call module_unloaded on module_desc::unload errors

fix operation of module_unload/module_destroy so that unloaded modules are now destroyed once they have been unloaded

fix some more valgrind errors

implement modules_path + module_load with NULL path

support irc_chan type for lua_module_conf

add nexus_lua_error for unified LUA_ERR* -> ERR_LUA_* mapping, and lua configuration support

implement a separate nexus_lua module

implement lua_log and lua_log_level

implement nexus_shutdown, lua_modules/lua_module, and lua_nexus

log outoing messages from irc_queue

fix off-by-one for end-NUL in strcpy bug

improve the config module futher, now the module_desc interface uses structured config_value's

implement lua_client_set_defaults

add irc_client_defaults to apply default values for irc_client_add_net irc_net_info, implement --defaults cmd opt and lua_client_connect

add irc_conn_PRIVMSG/irc_chan_PRIVMSG and lua bindings

add irc_chan and unify type/obj creation

add the add_history() call to console.c

wrap irc_net and add lua_net_join

add some rudimentary lua support, by having a simple interactive console, and providing access to irc_client_quit

add a simple interactive readline console

implement irc_queue for irc_conn, and add missing irc_queue_destroy, fix irc_conn_destroy

implement irc_queue, with some basic functionality tests

irc_chan_on_KICK

implement CTCP-ACTION for irc_log and test

documentation tweaks

some irc_net code to use said async connects