Cap rooting benefits

Otherwise they'll push you into Hibernation.  Temp fix is still a fix.
Roomy Shell

As requested:
http://smf.cataclysmdda.com/index.php?topic=3982.msg180373#msg180373
Fix text error

Thanks for the catch, Mshock777.
Nausea & Vomitous On Demand

For the Canadian folks:
http://smf.cataclysmdda.com/index.php?topic=3982.msg181013#msg181013
http://smf.cataclysmdda.com/index.php?topic=3982.msg181082#msg181082

(And it's realistically a poor-survivor's blood filter: reduces drunk,
food poisoning, etc.)
Mycus tweaks

Apples provide more quench and less fun, and only give mutations if you
don't yet have Feeder; active spore-use is cheaper, mutations are now a
one_in 8 every time you have a dream.
Merge pull request #9522 from KA101/muts

Mutation stuff again