cache: allow ellipse style entries for MINIO_CACHE_DRIVES (#6088)

Fixes #5863

docs/config/README.md

@@ -110,6 +110,7 @@ By default, parity for objects with standard storage class is set to `N/2`, and
 |``drives``| _[]string_ | List of mounted file system drives with [`atime`](http://kerolasa.github.io/filetimes.html) support enabled|
 |``exclude`` | _[]string_ | List of wildcard patterns for prefixes to exclude from cache |
 |``expiry`` | _int_ | Days to cache expiry |
+|``maxuse`` | _int_ | Percentage of disk available to cache |
 
 #### Notify
 |Field|Type|Description|

docs/config/config.sample.json

@@ -1,11 +1,12 @@
 {
-    "version": "24",
+    "version": "26",
     "credential": {
         "accessKey": "USWUXHGYZQYFYFFIT3RE",
         "secretKey": "MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03"
     },
     "region": "us-east-1",
     "browser": "on",
+    "worm": "off",
     "domain": "",
     "storageclass": {
         "standard": "",
@@ -14,11 +15,12 @@
     "cache": {
         "drives": [],
         "expiry": 90,
-        "exclude": []
+        "exclude": [],
+        "maxuse": 80
     },
     "usage": {
         "interval": "3h"
-    }
+    },
     "notify": {
         "amqp": {
             "1": {
@@ -124,3 +126,4 @@
         }
     }
 }
+