added a note about locking fixes

README

@@ -62,14 +62,14 @@ BIND 9.9.0
         - New 'rndc sync' command dumps pending changes in a dynamic
           zone to disk without a freeze/thaw cycle.
         - New 'rndc signing' command displays or clears signing status
-          records in 'auto-dnssec' zones
+          records in 'auto-dnssec' zones.
         - NSEC3 parameters for 'auto-dnssec' zones can now be set prior
           to signing, eliminating the need to initially sign with NSEC.
-        - Startup time improvements on large authoritative servers
-        - Slave zones are now saved in raw format by default
-        - Several improvements to response policy zones (RPZ)
-        - Improved scalability from using multiple threads to
-          listen for queries.
+        - Startup time improvements on large authoritative servers.
+        - Slave zones are now saved in raw format by default.
+        - Several improvements to response policy zones (RPZ).
+        - Improved hardware scalability by using multiple threads
+          to listen for queries and using finer-grained client locking
         - The 'also-notify' option now takes the same syntax as
           'masters', so it can used named masterlists and TSIG keys.
         - 'dnssec-signzone -D' writes an output file containing only DNSSEC
@@ -87,7 +87,7 @@ BIND 9.9.0
         - Dynamic updates can now optionally set the zone's SOA serial
           number to the current UNIX time.
         - DLZ modules can now retrieve the source IP address of
-          the querying client
+          the querying client.
         - 'request-ixfr' option can now be set at the per-zone level.
 
 BIND 9.8.0