Tweak/remove the recipe for Strange Reagent

[ju45he]

I think the bulk of the problem is just that you can get a rounds supply of a "rare/valuable" chemical with a little effort at roundstart. Increasing the threshold to something like 10u and getting rid of medbays roundstart omnizine should encourage people to go to botany instead.

Replacing it seems unnecessary to replace SR with some medical feature, and would also replace the only way for most antagonists to revive a friend without going to cloning and taking a big risk of getting caught.