Add documentation to readme/list of services

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

README.md

@@ -45,6 +45,8 @@ Using this playbook, you can get the following services configured on your serve
 
 - (optional, advanced) the [matrix-synapse-ldap3](https://github.com/matrix-org/matrix-synapse-ldap3) LDAP Auth password provider module
 
+- (optional, advanced) the [matrix-ldap-registration-proxy](https://gitlab.com/activism.international/matrix_ldap_registration_proxy)  a proxy that handles Matrix registration requests and forwards them to LDAP.
+
 - (optional, advanced) the [synapse-simple-antispam](https://github.com/t2bot/synapse-simple-antispam) spam checker module
 
 - (optional, advanced) the [Matrix Corporal](https://github.com/devture/matrix-corporal) reconciliator and gateway for a managed Matrix server

docs/configuring-playbook.md

@@ -86,6 +86,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Setting up the LDAP password provider module](configuring-playbook-ldap-auth.md) (optional, advanced)
 
+- [Setting up the ldap-registration-proxy](configuring-playbook-matrix-ldap-registration-proxy.md) (optional, advanced)
+
 - [Setting up Synapse Simple Antispam](configuring-playbook-synapse-simple-antispam.md) (optional, advanced)
 
 - [Setting up Matrix Corporal](configuring-playbook-matrix-corporal.md) (optional, advanced)
@@ -179,3 +181,5 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 - [Setting up the Sygnal push gateway](configuring-playbook-sygnal.md) (optional)
 
 - [Setting up the ntfy push notifications server](configuring-playbook-ntfy.md) (optional)
+
+