BIND 10 trac493, updated. c5ce94c579d2d022cc7a39f826599c12c193dc20 [trac493] update TODO file

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- Log -----------------------------------------------------------------
commit c5ce94c579d2d022cc7a39f826599c12c193dc20
Author: Ocean Wang <wanghaidong at cnnic.cn>
Date:   Thu Mar 3 17:38:59 2011 +0800

    [trac493] update TODO file

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Summary of changes:
 src/lib/cache/TODO |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

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diff --git a/src/lib/cache/TODO b/src/lib/cache/TODO
index a7d2458..aa7e3b0 100644
--- a/src/lib/cache/TODO
+++ b/src/lib/cache/TODO
@@ -11,4 +11,8 @@
   to expire.
 * When the rrset beging updated is an NS rrset, NSAS should be updated
   together.
+* Share the NXDOMAIN info between different type queries. current implementation
+  can only cache for the type that user quired, for example, if user query A 
+  record of a.example. and the server replied with NXDOMAIN, this should be
+  cached for all the types queries of a.example.