[MERGED PR] Purgatives and dialysis machine rebalance

[saccharineChampion]

I don't think it's a Classic/RP thing; for my part, at least, I only had Classic in mind when I wrote my advocation of shifting the focus on ling countering being self-sufficient stuff vs. making it more reliant on other people. And I do think that the nerfs to purgatives would make the game more interesting, not less, for the reasons described in my first post here.