Update manual to reference the IANA TLS Cipher Suites Registry
@@ -115,7 +115,9 @@ used. The format is described below.
The cipher list consists of one or more I<cipher strings> separated by colons.
Commas or spaces are also acceptable separators but colons are normally used.
-The cipher string may reference a cipher using its standard name.
+The cipher string may reference a cipher using its standard name from
+the IANA TLS Cipher Suites Registry
+(L<https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4>).
The actual cipher string can take several different forms.
