Clarify that a token is just a password

- Token is an overloaded term; clarify that it is just a password in the
  Gitaly documentation.
Signed-off-by: Robert Marshall <rmarshall@gitlab.com>

doc/administration/gitaly/index.md

@@ -89,6 +89,10 @@ your GitLab installation has three repository storages: `default`,
 `storage1` and `storage2`. You can use as little as just one server with one
 repository storage if desired.
 
+Note: **Note:** The token referred to throughout the Gitaly documentation is
+just an arbitrary password selected by the administrator. It is unrelated to
+tokens created for the GitLab API or other similar web API tokens.
+
 ### 1. Installation
 
 First install Gitaly on each Gitaly server using either