docs: add KNPT_MCSD_ADMINEXCLUDE configuration details

- Document the `mcsd.adminexclude` parameter in `CONFIGURATION.md` and `INTEGRATION.md`.
- Explain its use for excluding directories, preventing self-referencing loops.

Author: rolandgroen

docs/CONFIGURATION.md

@@ -24,6 +24,7 @@ Environment variables use the prefix `KNPT_` followed by the configuration path
 | `KNPT_MCSDADMIN_FHIRBASEURL`        | `mcsdadmin.fhirbaseurl`        | (Optional) FHIR base URL of the local mCSD Administration Directory, if managed through the mCSD Web Application.                                            |
 | `KNPT_MCSD_QUERY_FHIRBASEURL`       | `mcsd.query.fhirbaseurl`       | FHIR base URL of the local mCSD Query Directory to synchronize to.                                                                                           |
 | `KNPT_MCSD_ADMIN_<KEY>_FHIRBASEURL` | `mcsd.admin.<key>.fhirbaseurl` | Map of root directories (mCSD Admin Directory FHIR base URLs) to synchronize from.                                                                           |
+| `KNPT_MCSD_ADMINEXCLUDE`            | `mcsd.adminexclude`            | (Optional) List of FHIR base URLs to exclude from being registered as administration directories. Useful to prevent self-referencing loops when the query directory is discovered as an Endpoint. Multiple values can be specified as a comma-separated list. |
 | **Localization / NVI**              |                                |                                                                                                                                                              |
 | `KNPT_NVI_BASEURL`                  | `nvi.baseurl`                  | Base URL of the NVI service.                                                                                                                                 |
 | `KNPT_NVI_AUDIENCE`                 | `nvi.audience`                 | Name of the NVI service, used for creating BSN transport tokens.<br/>Defaults to `nvi`.                                                                      |

docs/INTEGRATION.md

@@ -31,8 +31,9 @@ You also need to provide a FHIR server as mCSD Query Directory, to which mCSD re
 
 Then, configure:
 
-- the Root Administration Directory to synchronize from (`mcsd.admin.<key>.fhirbaseurl`), and
-- the local Query Directory to synchronize to (`mcsd.query.fhirbaseurl`).
+- the Root Administration Directory to synchronize from (`mcsd.admin.<key>.fhirbaseurl`),
+- the local Query Directory to synchronize to (`mcsd.query.fhirbaseurl`), and
+- (optional) directories to exclude from synchronization (`mcsd.adminexclude`), which is useful to prevent self-referencing loops when your own query directory appears as a discovered Endpoint.
 
 ### Triggering synchronization