doc: standards: link IMAP capabilities and response codes

We'll be implementing some IMAP search/threading extensions in
IMAP and providing analogues over HTTP via JMAP.

diff --git a/Documentation/standards.perl b/Documentation/standards.perl
index b4bda8a9c06801df7be144e5606c66b7ce8017b6..a64f033e63c13347b9fe5e1790966fcb4041f3c2 100755 (executable)
--- a/Documentation/standards.perl
+++ b/Documentation/standards.perl
@@ -72,6 +72,10 @@ print <<'EOF'
 Other relevant documentation
 ----------------------------
 
+* IMAP capabilities registry and response codes:
+  https://www.iana.org/assignments/imap-capabilities
+  https://www.iana.org/assignments/imap-response-codes
+
 * Documentation/technical/http-protocol.txt in git source code:
   https://public-inbox.org/git/9c5b6f0fac/s