added better text to describe the license change
added information about the following changes to notes.xml
+4396. [func] dnssec-keymgr now takes a '-r randomfile' option.
+ [RT #42455]
+4392. [func] Collect statistics for RSSAC02v3 traffic-volume,
+ traffic-sizes and rcode-volume reporting. [RT #41475]
+4388. [func] Support for master entries with TSIG keys in catalog
+ zones. [RT #42577]
+4385. [func] Add support for allow-query and allow-transfer ACLs
+ to catalog zones. [RT #42578]
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