Fixup HISTORY.md for e9ba4ba "validate range tombstone covers positive range"

Moved it from the wrong section (6.10) to the right section (Unreleased).
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Andrew Kryczka 2020-05-07 14:48:30 -07:00 committed by GitHub
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@ -6,6 +6,7 @@
### Public API Change
* Flush(..., column_family) may return Status::ColumnFamilyDropped() instead of Status::InvalidArgument() if column_family is dropped while processing the flush request.
* BlobDB now explicitly disallows using the default column family's storage directories as blob directory.
* DeleteRange now returns `Status::InvalidArgument` if the range's end key comes before its start key according to the user comparator. Previously the behavior was undefined.
## 6.10 (5/2/2020)
### Bug Fixes
@ -22,7 +23,6 @@
* Add a ConfigOptions argument to the APIs dealing with converting options to and from strings and files. The ConfigOptions is meant to replace some of the options (such as input_strings_escaped and ignore_unknown_options) and allow for more parameters to be passed in the future without changing the function signature.
* Add NewFileChecksumGenCrc32cFactory to the file checksum public API, such that the builtin Crc32c based file checksum generator factory can be used by applications.
* Add IsDirectory to Env and FS to indicate if a path is a directory.
* DeleteRange now returns `Status::InvalidArgument` if the range's end key comes before its start key according to the user comparator. Previously the behavior was undefined.
### New Features
* Added support for pipelined & parallel compression optimization for `BlockBasedTableBuilder`. This optimization makes block building, block compression and block appending a pipeline, and uses multiple threads to accelerate block compression. Users can set `CompressionOptions::parallel_threads` greater than 1 to enable compression parallelism. This feature is experimental for now.