added a comment about md5, thanks Osman

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-07-18 18:24:53) dev
+Version 2.00.0 (2012-07-18 18:32:43) dev

gluon/validators.py

@@ -2628,7 +2628,15 @@ class CRYPT(object):
 
     """
 
-    def __init__(self, key=None, digest_alg='md5', min_length=0, error_message='too short', salt=None):
+    def __init__(self, key=None, digest_alg='md5', min_length=0, 
+                 error_message='too short', salt=None):
+        """
+        important, digest_alg='md5' is not the default hashing algorithm for
+        web2py. This is only an example of usage of this function.
+
+        The actual hash algorithm is determined from the key which is
+        generated by web2py in tools.py. This defaults to hmac+sha512.       
+        """
         self.key = key
         self.digest_alg = digest_alg
         self.min_length = min_length