Typo corrected...

doc/crypto/crypto.pod

diff --git a/doc/crypto/crypto.pod b/doc/crypto/crypto.pod
index cce4e4e..b6efcf8 100644
--- a/doc/crypto/crypto.pod
+++ b/doc/crypto/crypto.pod
@@ -40,7 +40,7 @@
 
 =item AUTHENTICATION CODES, HASH FUNCTIONS
 
-L<hmac(3)|hmac(3)>, L<md2(3)|md5(3)>, L<md5(3)|md5(3)>, L<mdc2(3)|mdc2(3)>,
+L<hmac(3)|hmac(3)>, L<md2(3)|md2(3)>, L<md5(3)|md5(3)>, L<mdc2(3)|mdc2(3)>,
 L<ripemd(3)|ripemd(3)>, L<sha(3)|sha(3)> 
 
 =item AUXILIARY FUNCTIONS