* CP1251: contributed by Byte
+New feature of version 6.7.0
+--------------------------
+
+* NEW: hexadecimal codepoint \uHHHH
+* NEW: add ONIG_SYNTAX_ONIGURUMA (== ONIG_SYNTAX_DEFAULT)
+* Disabled \N and \O on ONIG_SYNTAX_RUBY
+* Reduced object size
+
+
+New feature of version 6.6.1
+--------------------------
+
+* Fix definition of \X
+
+
New feature of version 6.6.0
--------------------------