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

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Uddipta Maity b55e2165be Rocksdb backup can store optional application specific metadata ... Summary: Rocksdb backup engine maintains metadata about backups in separate files. But, there was no way to add extra application specific data to it. Adding support for that. In some use cases, applications decide to restore a backup based on some metadata. This will help those cases to cheaply decide whether to restore or not. Test Plan: Added a unit test. Existing ones are passing Sample meta file for BinaryMetadata test- ``` 1459454043 0 metadata 6162630A64656600676869 2 private/1/MANIFEST-000001 crc32 1184723444 private/1/CURRENT crc32 3505765120 ``` Reviewers: sdong, ldemailly, andrewkr Reviewed By: andrewkr Subscribers: andrewkr, dhruba, ldemailly Differential Revision: https://reviews.facebook.net/D56007		9 years ago
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rocksdb	Rocksdb backup can store optional application specific metadata	9 years ago