[#579] config: Change config example to be compatible with YAML 1.2 standard

In accordance with the YAML 1.2 specification, octal numbers must begin with the 0o prefix.

Change-Id: Icb2e83a4aa75c1eb91decd0b7c9b146aaa9fb3e2
Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>

config/example/node.yaml

@@ -148,7 +148,7 @@ storage:
         flush_worker_count: 30  # number of write-cache flusher threads
 
       metabase:
-        perm: 0644  # permissions for metabase files(directories: +x for current user and group)
+        perm: 0o644  # permissions for metabase files(directories: +x for current user and group)
         max_batch_size: 200
         max_batch_delay: 20ms
 
@@ -161,13 +161,13 @@ storage:
 
       blobstor:
         - size: 4m  # approximate size limit of single blobovnicza instance, total size will be: size*width^(depth+1), bytes
-          perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
+          perm: 0o644  # permissions for blobstor files(directories: +x for current user and group)
           depth: 1  # max depth of object tree storage in key-value DB
           width: 4   # max width of object tree storage in key-value DB
           opened_cache_capacity: 50  # maximum number of opened database files
           opened_cache_ttl: 5m  # ttl for opened database file
           opened_cache_exp_interval: 15s  # cache cleanup interval for expired blobovnicza's
-        - perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
+        - perm: 0o644  # permissions for blobstor files(directories: +x for current user and group)
           depth: 5  # max depth of object tree storage in FS
 
       gc:
@@ -291,7 +291,7 @@ storage:
       pilorama:
         path: tmp/1/blob/pilorama.db
         no_sync: true # USE WITH CAUTION. Return to user before pages have been persisted.
-        perm: 0644 # permission to use for the database file and intermediate directories
+        perm: 0o644 # permission to use for the database file and intermediate directories
 
 tracing:
   enabled: true

docs/storage-node-configuration.md

@@ -209,7 +209,7 @@ blobstor:
     width: 4
   - type: fstree
     path: /path/to/blobstor/blobovnicza
-    perm: 0644
+    perm: 0o644
     size: 4194304
     depth: 1
     width: 4
@@ -269,7 +269,7 @@ gc:
 ```yaml
 metabase:
   path: /path/to/meta.db
-  perm: 0644
+  perm: 0o644
   max_batch_size: 200
   max_batch_delay: 20ms
 ```