Merge pull request moby#48486 from thaJeztah/dockerd_man_features

man: update dockerd man-page to include --feature flag

man/dockerd.8.md

@@ -31,6 +31,7 @@ dockerd - Enable daemon mode
 [**--exec-opt**[=*[]*]]
 [**--exec-root**[=*/var/run/docker*]]
 [**--experimental**[=**false**]]
+[**--feature**[=*NAME*=**true**|**false**]
 [**--fixed-cidr**[=*FIXED-CIDR*]]
 [**--fixed-cidr-v6**[=*FIXED-CIDR-V6*]]
 [**-G**|**--group**[=*docker*]]
@@ -222,6 +223,14 @@ $ sudo dockerd --add-runtime runc=runc --add-runtime custom=/usr/local/bin/my-ru
 **--experimental**=""
   Enable the daemon experimental features.
 
+**--feature**=*NAME*=**true**|**false**
+  Enable or disable feature feature in the daemon. This option corresponds
+  with the "features" field in the daemon.json configuration file. Using
+  both the command-line option and the "features" field in the configuration
+  file produces an error. The feature option can be specified multiple times
+  to configure multiple features.
+  Usage example: `--feature containerd-snapshotter=true`
+
 **--fixed-cidr**=""
   IPv4 subnet for fixed IPs (e.g., 10.20.0.0/16); this subnet must be nested in
   the bridge subnet (which is defined by \-b or \-\-bip).