Updated Storage Backends (markdown)

Storage-Backends.md

@@ -175,3 +175,36 @@ To use Hubic as the storage, you first need to download a token file from https:
 Hubic offers the most free space (25GB) of all major cloud providers and there is no bandwidth charge (same as Google Drive and OneDrive), so it may be worth a try.
 
 </details>
+
+<details> <summary>OpenStack Swift</summary>
+
+```
+Storage URL: swift://user@auth_url/container/path
+```
+
+If the storage requires more parameters you can specify them in the query string:
+
+```
+swift://user@auth_url/container/path?tenant=<tenant>&domain=<domain>
+```
+
+The following is the list of parameters accepted by the query string:
+
+* domain
+* domain_id
+* user_id
+* retries
+* user_agent
+* timeout
+* connection_timeout
+* region
+* tenant
+* tenant_id
+* endpiont_type
+* tenant_domain
+* tenant_domain_id
+* trust_id
+
+This backend is implemented using https://github.com/ncw/swift.
+
+</details>