Update HISTORY.md

HISTORY.md

@@ -5,6 +5,7 @@
 * enum type CompressionType and PerfLevel changes from char to unsigned char. Value of all PerfLevel shift by one.
 * Deprecate options.filter_deletes.
 * options.memtable_prefix_bloom_huge_page_tlb_size => memtable_huge_page_size. When it is set, RocksDB will try to allocate memory from huge page for memtable too, rather than just memtable bloom filter.
+* Options file is in backup now. After restore, you can load options file and reuse it.
 
 ### New Features
 * Add avoid_flush_during_recovery option.