Is there a simple doc about configure ldap authenticate with freeraidus-3.0.1 ?  I am confused about it.

I've questioned the developer on Github https://github.com/FreeRADIUS/freeradius-server/issues/531, but it did not solve my problem.

In "mods-available/ldap" 

# Note: set_auth_type was removed in v3.x.x

# Equivalent functionality can be achieved by adding the following

# stanza to the authorize {} section of your virtual server.

#

#    ldap

#    if ((ok || updated) && User-Password) {

#        update {

#            control:Auth-Type := ldap   

#        }

#    }

So I add the stanza to virtual server, "radiusd -X" says

Unknown value 'ldap' for attribute 'Auth-Type'

I then add

VALUE   Auth-Type           LDAP        1026

to "/usr/local/share/freeradius/dictionary.freeradius.internal", but "radiusd -X" says

(0) Found Auth-Type = LDAP

(0) WARNING: Unknown value specified for Auth-Type.  Cannot perform requested action.

(0) Failed to authenticate the user.

Any body can tell me a clear progress about configure ldap authenticate? Thanks very much.