Adds info on certificates with the MinIO Client (#782)

- Adds a new section on certificates to the MinIO Client page
- Adds a new section in Behaviors to the mc alias set page
- Minor fix to a --json flag command in version doc

Closes #781

source/reference/minio-mc.rst

@@ -418,6 +418,34 @@ The following list describes each possible file path location in the order
 
 You can use the ``--config-dir``
 
+.. _minio-mc-certificates:
+
+Certificates
+------------
+
+The MinIO Client stores certificates and CAs for deployments to the following paths:
+
+Linux, MacOS, and other Unix-like systems:
+
+.. code-block:: shell
+
+   ~/.mc/certs/ # certificates
+   ~/.mc/certs/CAs/ # Certificate Authorities
+
+Windows systems:
+
+.. code-block:: shell
+
+   C:\Users\[username]\mc\certs\ # certificates
+   C:\Users\[username]\mc\certs\CAs\ # Certificate Authorities
+
+When creating a new :ref:`alias <minio-mc-alias>`, the MinIO Client fetches the peer certificate, computes the public key fingerprint, and asks the user whether to accept the deployment's certificate.
+If you decide to trust the certificate, the MinIO Client adds the certificate to the certificate authority path listed above.
+
+.. note::
+
+   In testing environments, you can bypass the certificate check for selected MinIO Client commands by passing the ``--insecure`` flag.
+
 .. _minio-mc-global-options:
 
 Global Options

source/reference/minio-mc/mc-alias-set.rst

@@ -198,4 +198,14 @@ For more complete documentation on S3 Access Control, see
 :s3-docs:`Amazon S3 Security <security.html>`.
 
 For all other S3-compatible services, defer to the documentation for that
-service.
+service.
+
+Certificates
+~~~~~~~~~~~~
+
+The MinIO Client fetches the peer certificate, computes the public key fingerprint, and asks the user whether to accept the deployment's certificate.
+
+If trusted, the MinIO Client automatically adds the certificate authority to:
+
+-  ``~/.mc/certs/CAs/`` on Linux and other Unix-like systems.
+-  ``C:\Users\[username]\mc\certs\CAs\`` on Windows systems.