removed ldap docs that was not valid any more

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1527 44740490-163a-0410-bde0-09ae8108e29a

docs/ldap_config.txt

-The LDAP configuration array
-============================
-
-
-The LDAP configuration array is used in all of the LDAP based authentication modules. 
-
-We distinguish between two modes of deciding the DN of the user.
-
-  1. Search for DN by userid attribute, usually `eduPersonPrincipalName`.
-  2. Decide the DN based on a known pattern and then filling in the username.
-
-
-Example configuration for DN search
------------------------------------
-
-TBA
-
-Example configuration for DN pattern
-------------------------------------
-
-TBA
-
-
-
-List of parameters
-------------------
-
-
-  * type which LDAP backend to use.
-  * testType A class that defines a test for it.
-  * hostname (required)
-  * enable_tls (optional)
-  * debugLDAP (optional)
-  * timeout (optional)  default: 20s
-  * adminUser (optional)
-  * adminPassword (required if adminUser is set)
-  * useridAttr (optional) default: eduPersonPrincipalName
-  * searchbase (required)
-  * dnpattern
-  * attributesize.max (optional) defualt: 
-  * debug
-  * contactMail
-  * contactUrl
-  * comment