Dramatically speeds up boot with testing (MC_TICKLIMIT_INIT > 100) configs; stoplag() would penalize procs that go over 100% tick-usage by delaying them further. This is not required during server boot & the lobby, and resulted in significantly longer boot times.
This PR ports a fix from /tg/ that forces stoplag() only sleep 1 tick if it sleeps during server boot, as well as adjusting the example config to be more suited for testing.