fix doc - thanks
@@ -769,7 +769,7 @@ registry.
| `host` | no | A fully-qualified URL for an externally-reachable address for the registry. If present, it is used when creating generated URLs. Otherwise, these URLs are derived from client requests. |
| `secret` | no | A random piece of data used to sign state that may be stored with the client to protect against tampering. For production environments you should generate a random piece of data using a cryptographically secure random generator. If you omit the secret, the registry will automatically generate a secret when it starts. **If you are building a cluster of registries behind a load balancer, you MUST ensure the secret is the same for all registries.**|
| `relativeurls`| no | If `true`, the registry returns relative URLs in Location headers. The client is responsible for resolving the correct URL. **This option is not compatible with Docker 1.7 and earlier.**|
-| `draintimeout`| no | Amount of time to wait for HTTP connections to drain before shutting after registry receives SIGTERM signal|
+| `draintimeout`| no | Amount of time to wait for HTTP connections to drain before shutting down after registry receives SIGTERM signal|
### `tls`
