EGD info, as requested.

doc/crypto/RAND_egd.pod

@@ -14,7 +14,13 @@ RAND_egd - Query entropy gathering daemon
 
 RAND_egd() queries the entropy gathering daemon EGD on socket B<path>.
 
-=head1 RETURN VALUES
+EGD is available from http://www.lothar.com/tech/crypto/ (C<perl
+Makefile.PL; make; make install> to install). It is run as B<egd>
+I<path>, where I<path> is an absolute path designating a socket. When
+RAND_egd() is called with that path as an argument, it tries to read
+random bytes that EGD has collected.
+
+=head1 RETURN VALUE
 
 RAND_egd() returns the number of bytes read from the daemon on
 success, and -1 if the connection failed or the daemon did not return