function set_idle_status(mark_as_away)
    local servers = {}
    for c in hexchat.iterate("channels") do
         -- Extract servers from channel.
        if c.type == 2 then
            if servers[tostring(c.server)] == nil then
                servers[tostring(c.server)] = (bit.band(c.flags, 4) ~= 0)
            end
        end
    end

    for srv,away in pairs(servers) do
        local srv_context = hexchat.find_context(srv, nil)

        if mark_as_away and not away then
            if hexchat.set_context(srv_context) then
                hexchat.command("AWAY Marked as away automatically")
            end
        elseif not mark_as_away and away then
            if hexchat.set_context(srv_context) then
                hexchat.command("BACK")
            end
        end
    end
end