add comment on md5

src/etc/passwd.conf

@@ -1,4 +1,4 @@
-#	$OpenBSD: passwd.conf,v 1.2 1997/02/16 23:45:29 deraadt Exp $
+#	$OpenBSD: passwd.conf,v 1.3 1997/03/27 00:07:14 provos Exp $
 #
 # Passwd configuration file
 #
@@ -7,6 +7,7 @@
 # they can take values of
 #	old		- old unix style salt of 12bit
 #	newsalt		- DES hash with salt of 64 bit
+#	md5		- MD5 hashing algorithmus
 #	blowfish,x	- Blowfish cipher, x is number of rounds
 #			  128 bit salt, 4 rounds are min, 31 max