modern openssl needs rsa key >= 2048

per
https://docs.openssl.org/3.3/man3/SSL_CTX_set_security_level/#default-callback-behaviour
the default "security level" in openssl 3.3 is 2

pkgs/certifix-client/certifix-client.fnl

@@ -53,7 +53,7 @@
 (local options (parse-args arg))
 
 (fn private-key []
-  (pkey.new { :type :rsa :bits 1024 }))
+  (pkey.new { :type :rsa :bits 2048 }))
 
 (fn signing-request [pk]
   (doto (csr.new)