Initial work for git-managed redirects (#556)

This is the initial work for what should be a git-managed set of nginx
configs we can include into the Nginx Docs server.

The idea here is we manage redirects in git, and either chron-copy them
to a location we can include via the sites-available/<file>, *or* we
just include them from the git path (if nginx tolerates that)

I can't really _test_ these right now since they are using live URLs. if
we move forward with the soft-launch, we'll have a few opportunities to
maybe test a subset of these URLs and see what happens.

Please let me know if there is anything *obviously* wrong here.

ToDo: The Legacy Docs redirects

source/default-conf.py

@@ -142,7 +142,8 @@ elif tags.has("macos"):
         'reference/kubectl-minio-plugin*',
         'reference/minio-server*',
         'reference/minio-mc*',
-        'developers/*'
+        'developers/*',
+        'integrations/*'
     ]
 elif tags.has("windows"):
     # html_baseurl is used for generating the sitemap.xml for each platform. These are combined in a sitemapindex.xml.
@@ -159,7 +160,8 @@ elif tags.has("windows"):
         'reference/kubectl-minio-plugin*',
         'reference/minio-server*',
         'reference/minio-mc*',
-        'developers/*'
+        'developers/*',
+        'integrations/*'
     ]
 elif tags.has("container"):
     html_baseurl = 'https://min.io/docs/minio/container/'
@@ -177,7 +179,8 @@ elif tags.has("container"):
         'reference/kubectl-minio-plugin*',
         'reference/minio-server*',
         'reference/minio-mc*',
-        'developers/*'
+        'developers/*',
+        'integrations/*'
     ]
 elif tags.has("k8s"):
     html_baseurl = 'https://min.io/docs/minio/kubernetes/upstream/'
@@ -191,7 +194,8 @@ elif tags.has("k8s"):
         'operations/manage-existing-deployments.rst',
         'reference/minio-server*',
         'reference/minio-mc*',
-        'developers/*'
+        'developers/*',
+        'integrations/*'
 
     ]
 else: