adjust config files and readme

readme.md

@@ -25,4 +25,16 @@ Start the container after creating the required volumes (see documentation of th
       -e MYSQL_ROOT_PASSWORD=test123 \
       wollud1969/mariadb-with-ldap-pam:latest
 
+Since one important scenario in my environment is access from dotnet applications, where the client plugin dialog is not available (https://mariadb.com/kb/en/library/authentication-plugin-pam/#using-the-plugin-with-mysqlconnector-for-net), I've add the configuration line
+
+    pam_use_cleartext_plugin = ON
+
+to the default configuration. This in turn requires SSL/TLS connections to the database server so I added the SSL configuration to the default config file.
+
+To enable users to access the database server with PAM/LDAP authentication, you still need to create those users in the database:
+
+    CREATE USER username@hostname IDENTIFIED VIA pam USING 'mariadb';
+
+For details see https://mariadb.com/kb/en/library/authentication-plugin-pam/
+