Update comments about EGD to include prngd.

INSTALL

@@ -261,8 +261,8 @@ Replacing /etc/ssh with the correct path to the configuration directory.
 (${prefix}/etc or whatever you specified with --sysconfdir during
 configuration).
 
-If you have configured OpenSSH with EGD support, ensure that EGD is
-running and has collected some Entropy.
+If you have configured OpenSSH with EGD/prngd support, ensure that EGD or
+prngd is running and has collected some entropy first.
 
 For more information on configuration, please refer to the manual pages
 for sshd, ssh and ssh-agent.