行会宣战：敌对状态的限时生效

local function declare(actor, target)
    sendmsg(actor, 1, "已宣战")   -- 只发通知，无敌对状态
end

local WARS = {}
local function declare(actor, g1, g2)
    local key = g1 .. "|" .. g2
    if WARS[key] and os.time() < WARS[key] then
        sendmsg(actor, 1, "宣战仍在生效中")
        return
    end
    WARS[g1 .. "|" .. g2] = os.time() + 86400
    WARS[g2 .. "|" .. g1] = os.time() + 86400   -- 双向登记
    sendmsg(actor, 1, "宣战生效24小时")
end