Meant to be part of #42864 , but got a little big so I'll add it to wichever gets merged last.
[Snailcrawl demonstration](https://youtu.be/IL7WFpfRo4c)
PROS
- Gets snailcrawl, wich makes them greatly faster and gives them a lube trail
- Their blood is spacelube
- They get a cool armored nodrop snail shell
- They don't slip
CONS
- Very slow
- Punch is pathetic
- Tttaaalllkkk llliiikkkeee ttthhhiiisss
- Extremely vulnerable to salt
- Can't wear glasses
Adds gastrolisis, wich is pretty much [this](https://www.youtube.com/watch?v=lFbPi8o0OEU) spongebob episode where they slowly turn into snails
You can also get gastrolisis by random_reagent_id, so maintpills and botany
🆑
add: Adds snailpeople as a rare genetics accident.
sprite: Snailshell sprites by nickvr628
/🆑
Snailshell sprites by @nickvr628
Why: It's a silly gimmicky race and it's a rare occurence. Also extremely highly requested for some reason
Tick contention is when the mc, sleep()/spawns(), and byond internal processing fight each other for game tick time. Usually in an unproductive way that wastes cpu cycles and reduces the effective amount of game tick to go around.
Tweaked the anti-tick contention heuristics of the MC a touch.
Fixed an incorrect operator in the mc's anti-tick contention heuristics causing it to apply in times of no lag rather then times of lag.
The mc's anti-tick contention heuristics now plays better with the high pop processing mode.
We no longer reserve the tail end of a tick for the mc to have if the mc doesn't plan to run next tick because of high pop mode or anti-tick contention heuristics.
stoplag() can now be given an initial delay allowing it to act like a smarter sleep (in that it sleeps for longer if the server is overwhelmed.
All short sleeps that only existed for performance reason and had no game play, visual/audio, or balance reasons behind their timing were converted to stoplag().
They now do not call the on exit storage hook when items are being
deleted, as well as do not bother to reset a bunch of values
we now cache the see contents list for a very small speed boost
the fancy storage specific update icon is moved to the fancy storage
equivalent proc