fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

sdong f9728640f3 "make format" against last 10 commits ... Summary: This helps Windows port to format their changes, as discussed. Might have formatted some other codes too becasue last 10 commits include more. Test Plan: Build it. Reviewers: anthony, IslamAbdelRahman, kradhakrishnan, yhchiang, igor Reviewed By: igor Subscribers: leveldb, dhruba Differential Revision: https://reviews.facebook.net/D41961		10 years ago
..
backupable_db.cc	"make format" against last 10 commits	10 years ago
backupable_db_test.cc	Multithreaded backup and restore in BackupEngineImpl	10 years ago