BIND 9.6-ESV-R7-P3 is now available

[pangj]

Should we use the latest 9.9 version of BIND instead of others 9.x?

>     BIND 9.6-ESV-R7-P3 is the latest production release of BIND
>     9.6-ESV.
>
>     BIND 9.6-ESV is an Extended Support Version of BIND 9.
>
>     This document summarizes changes from BIND 9.6-ESV-R6 to BIND
>     9.6-ESV-R7-P3.  Please see the CHANGES file in the source code
>     release for a complete list of all changes.