'crypto/tlsa/README.md' ändern

crypto/tlsa/README.md

@@ -1,3 +1,7 @@
-### References
-https://letsencrypt.org/certificates/
-https://community.letsencrypt.org/t/short-chain-and-dane/208422
+The files in this repo are outdated.
+
+### Recent References
+- https://dnssec-stats.ant.isi.edu/~viktor/x3hosts.html
+- https://letsencrypt.org/certificates/
+- https://community.letsencrypt.org/t/short-chain-and-dane/208422
+