Mc issues (#588)

Addresses five outstanding Issues in the `mc` reference docs.

- Adds `--disable-multipart` flag for `mc mv` (Closes #516 )
- Adds `mc pipe` to reference docs (Closes #517 )
- Adds `mc undo` to reference docs (Closes #520 )
- Adds `mc support top` commands to replace `mc admin top` (Closes #526)
- Updates `mc cp`, `mc mirror`, `mc replicate`, and `mc admin replicate`
to clarify the differences in what copies (Closes #532)

source/reference/minio-mc/mc-support-top-disk.rst

@@ -0,0 +1,69 @@
+=======================
+``mc support top disk``
+=======================
+
+.. default-domain:: minio
+
+.. contents:: Table of Contents
+   :local:
+   :depth: 2
+
+.. mc:: mc support top disk
+
+Syntax
+------
+
+.. start-mc-support-top-disk-desc
+
+The :mc:`mc support top disk` command displays current disk statistics.
+
+.. end-mc-support-top-disk-desc
+
+.. tab-set::
+
+   .. tab-item:: EXAMPLE
+
+      The following command udisplays the current in-progress S3 API calls on the :term:`alias` ``myminio``.
+
+      .. code-block:: shell
+         :class: copyable
+
+         mc support top disk myminio/
+
+   .. tab-item:: SYNTAX
+
+      The command has the following syntax:
+
+      .. code-block:: shell
+         :class: copyable
+
+         mc [GLOBALFLAGS] support top disk                     \
+                                      [--count, -c "integer"]  \
+                                      TARGET
+
+      .. include:: /includes/common-minio-mc.rst
+         :start-after: start-minio-syntax
+         :end-before: end-minio-syntax
+
+Parameters
+~~~~~~~~~~
+
+.. mc-cmd:: TARGET
+   :required:
+
+   The full path to the :ref:`alias <mc-alias-set>` or :term:`prefix` where the command should run.
+
+.. mc-cmd:: --count, -c
+   :optional:
+
+   Display statistics for up to the entered number of disks.
+
+   If no entry is made, the command returns statistics for up to 10 disks.
+
+Global Flags
+~~~~~~~~~~~~
+
+.. include:: /includes/common-minio-mc.rst
+   :start-after: start-minio-mc-globals
+   :end-before: end-minio-mc-globals
+