【运维发布】功能灰度放量：setsysvar开关与在线数监控

setsysvarex("FEAT_NEWFB", 10, 1)
local function featHit(actor)
    local pct = tonumber(getsysvar("FEAT_NEWFB") or "0")
    if pct >= 100 then return true end
    local r = math.random(1, 100)
    local hit = r <= pct
    if hit then
        sendluamsg(actor, 9911, pct, 0, 0, "hit")
    end
    return hit
end

setontimerex(77, 1800)
function ontimer77()
    local online = grobalinfo(6)
    if online < 300 then
        setsysvar("FEAT_NEWFB", 0)
        sendcentermsg("功能已临时关闭，维护后将恢复")
    end
end