facebook/flashcache — pull request #122 by MaximF (2013-05-07 19:54:22+00:00)
Title: Update flashcache-sa-guide.txt

There were two mentions of "writebehind" cache type.
From earlier declaration there are three types available: "Writethrough", "Writearound", "Writeback".
Probably "writebehind" means "Writearound".
Replaced those two mentions.