close[t:5100] close[t:4930] the api for closing a ft has been simplified for normal use. for recovery, there is a new function that internally asserts the underlying ft is close and passes a valid lsn to the cachefile for closing


git-svn-id: file:///svn/toku/tokudb@44748 c7de825b-a66e-492c-adef-691d508d4ae1