离会清理：成员离会的数据归档

local function onLeave(actor)
    sendmsg(actor, 1, "已退出行会")   -- 各处名单没人清
end

local function onLeave(actor, name)
    setsysvarex("ARCH_" .. name,
        tostring(getplayvar(actor, "CONTRIB")), 1)   -- 贡献归档
    RANKS[name] = nil               -- 榜单移除
    for _, task in ipairs(TASKS) do
        task.owner = task.owner == name and nil or task.owner
    end
    sendmsg(actor, 1, "行会数据已归档，欢迎再回")
end