[B<-help>]
[B<-c>]
[B<-d>]
+[B<-list>]
[B<-hex>]
[B<-binary>]
[B<-r>]
Print out BIO debugging information.
+=item B<-list>
+
+Prints out a list of supported message digests.
+
=item B<-hex>
Digest is to be output as a hex dump. This is the default case for a "normal"