Add OpenSSL to export notes

diff --git a/docs/markdown/appendix/crypto-notes-export.md b/docs/markdown/appendix/crypto-notes-export.md
index 5cc7d4120721a216e14ef7affd43b23cd6151587..09d9f726cc7cce96d4e68ac512550fb753a29269 100644 (file)
--- a/docs/markdown/appendix/crypto-notes-export.md
+++ b/docs/markdown/appendix/crypto-notes-export.md
@@ -5,6 +5,9 @@ PowerDNS does not itself implement any cryptographic algorithms but relies on th
 
 Furthermore, RSA, MD5 and the SHA-based algorithms are supplied as a copy of [mbed TLS](https://tls.mbed.org/).
 
+Starting with 4.0.0, PowerDNS will link in hash and cryptographic primitives from
+the open source [OpenSSL](https://openssl.org/) library.
+
 Optionally, PowerDNS can link in a copy of the open source [Botan](http://botan.randombits.org/) cryptographic library.
 
 Optionally, PowerDNS can link in a copy of the open source [Sodium](https://libsodium.org/) library.