Breaking up envvars and config settings into separate settings pages (#1028)

- Creates a slew of folders and pages nested under the mc-server page to store settings.
- Breaks up all of the environment variable options formerly in the mc-server page into these separate pages.
- Moves the config settings formerly in the mc admin config page to the appropriate new settings pages.
- Adds a MiniO Client settings page and document `mc-host-<alias>`

Closes #1017

source/reference/minio-server/settings/object-lambda.rst

@@ -0,0 +1,54 @@
+.. _minio-server-envvar-object-lambda-webhook:
+
+===============================
+Object Lambda Function Settings
+===============================
+
+.. default-domain:: minio
+
+.. contents:: Table of Contents
+   :local:
+   :depth: 2
+
+This page documents environment variables for configuring MinIO to publish data to an HTTP webhook endpoint and trigger an Object Lambda function.
+See :ref:`developers-object-lambda` for more complete documentation and tutorials on using these environment variables.
+
+You can specify multiple webhook endpoints as Lambda targets by appending a unique identifier ``_FUNCTIONNAME`` for each Object Lambda function.
+For example, the following command sets two distinct Object Lambda webhook endpoints:
+
+.. code-block:: shell
+   :class: copyable
+
+   export MINIO_LAMBDA_WEBHOOK_ENABLE_myfunction="on"
+   export MINIO_LAMBDA_WEBHOOK_ENDPOINT_myfunction="http://webhook-1.example.net"
+   export MINIO_LAMBDA_WEBHOOK_ENABLE_yourfunction="on"
+   export MINIO_LAMBDA_WEBHOOK_ENDPOINT_yourfunction="http://webhook-2.example.net"
+
+Environment Variables
+---------------------
+
+.. envvar:: MINIO_LAMBDA_WEBHOOK_ENABLE
+
+   Specify ``"on"`` to enable the Object Lambda webhook endpoint for a handler function.
+
+   Requires specifying :envvar:`MINIO_LAMBDA_WEBHOOK_ENDPOINT`.
+
+.. envvar:: MINIO_LAMBDA_WEBHOOK_ENDPOINT
+
+   The HTTP endpoint of the lambda webhook for the handler function.
+
+.. envvar:: MINIO_LAMBDA_WEBHOOK_AUTH_TOKEN
+
+   Specify the opaque string or JWT authorization token to use for authenticating to the lambda webhook service.
+
+   .. versionchanged:: RELEASE.2023-06-23T20-26-00Z
+
+      MinIO redacts this value when returned as part of :mc-cmd:`mc admin config get`.
+
+.. envvar:: MINIO_LAMBDA_WEBHOOK_CLIENT_CERT
+
+   Specify the path to the client certificate to use for performing mTLS authentication to the lambda webhook service.
+
+.. envvar:: MINIO_LAMBDA_WEBHOOK_CLIENT_KEY
+
+   Specify the path to the private key to use for performing mTLS authentication to the lambda webhook service.