Add Dogsled to linting (#4025)

* add dogsled

* add back comments

.golangci.yml

@@ -6,9 +6,7 @@ linters:
   disable:
     - gocyclo
     - golint
-    - maligned
     - errcheck
-    - interfacer
     - unparam
     - lll
     - gochecknoglobals
@@ -16,9 +14,11 @@ linters:
     - stylecheck
     - funlen
     - godox
-    - dogsled
     - whitespace
-# linters-settings:
+
+linters-settings:
+  dogsled:
+    max-blank-identifiers: 3
 #   govet:
 #     check-shadowing: true
 #   golint: