Merge pull request #12465 from spacewander/fdoc

chore: update the documentation link in the comment

etcdctl/READMEv2.md

@@ -328,7 +328,7 @@ Releases will follow lockstep with the etcd release cycle.
 
 etcdctl is under the Apache 2.0 license. See the [LICENSE][license] file for details.
 
-[authentication]: ../Documentation/v2/authentication.md
+[authentication]: https://github.com/etcd-io/website/blob/master/content/docs/v2/authentication.md
 [etcd]: https://github.com/coreos/etcd
 [github-release]: https://github.com/coreos/etcd/releases/
 [license]: ../LICENSE

server/etcdserver/api/membership/cluster.go

@@ -556,7 +556,7 @@ func (c *RaftCluster) IsReadyToAddVotingMember() bool {
 
 	if nstarted == 1 && nmembers == 2 {
 		// a case of adding a new node to 1-member cluster for restoring cluster data
-		// https://github.com/etcd-io/etcd/blob/master/Documentation/v2/admin_guide.md#restoring-the-cluster
+		// https://github.com/etcd-io/website/blob/master/content/docs/v2/admin_guide.md#restoring-the-cluster
 		c.lg.Debug("number of started member is 1; can accept add member request")
 		return true
 	}

server/etcdserver/api/v2error/error.go

@@ -13,7 +13,8 @@
 // limitations under the License.
 
 // Package v2error describes errors in etcd project. When any change happens,
-// Documentation/v2/errorcode.md needs to be updated correspondingly.
+// https://github.com/etcd-io/website/blob/master/content/docs/v2/errorcode.md
+// needs to be updated correspondingly.
 // To be deprecated in favor of v3 APIs.
 package v2error