update NEWS

NEWS

@@ -3,11 +3,13 @@ Knot DNS 1.6.0-rc1 (2014-10-13)
 
 Features:
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- - Persistent timers for slave zones
+ - Persistent timers for slave zones (expire, refresh, and flush)
 
-Bufixes:
+Bugfixes:
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- - RFC compliant processing of letter case in RDATA domain names
+ - DNSSEC: RFC compliant processing of letter case in RDATA domain names
+ - EDNS: Return minimal error response for queries with unsupported version
+ - EDNS: Fix interpretation of Extended RCODE
 
 Knot DNS 1.5.3 (2014-09-15)
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