[lsd0001] branch master updated: change MUST to SHOULD, add clear justification, especially GNS2DNS is clearly a SHOULD

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grothoff pushed a commit to branch master
in repository lsd0001.

The following commit(s) were added to refs/heads/master by this push:
     new a3b1329  change MUST to SHOULD, add clear justification, especially 
GNS2DNS is clearly a SHOULD
a3b1329 is described below

commit a3b132995c4b98395a22c7c774d435cfb06144d2
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Tue Feb 1 20:22:42 2022 +0100

    change MUST to SHOULD, add clear justification, especially GNS2DNS is 
clearly a SHOULD
---
 draft-schanzen-gns.xml | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/draft-schanzen-gns.xml b/draft-schanzen-gns.xml
index 66e3e05..0db3206 100644
--- a/draft-schanzen-gns.xml
+++ b/draft-schanzen-gns.xml
@@ -882,11 +882,15 @@ zTLD := zkl[126..129].zkl[63..125].zkl[0..62]
      <name>Zone Delegation Records</name>
      <t>
        This section defines the initial set of zone delegation record types.
-       Any implementation MUST support all zone types defined here and
+       Any implementation SHOULD support all zone types defined here and
        MAY support any number of additional delegation records defined in
-       the GNU Name System Record Types registry <xref target="gana"/>.
-       Zone delegation records MUST NOT be stored and published under the
-       empty label.
+       the GNU Name System Record Types registry (see <xref target="gana"/>).
+       Not supporting some zone types MAY result in resolution failures. This
+       MAY BE a valid choice if some zone delegation record types have been
+       determined to be cryptographically insecure, or if an application has
+       reasons to not support delegation to DNS for reasons such as complexity
+       or security.  Zone delegation records MUST NOT be stored and published
+       under the empty label.
      </t>
      <section anchor="gnsrecords_pkey" numbered="true" toc="default">
        <name>PKEY</name>

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