more swagger docs + other changes (#125)

* more swagger docs + other changes

* go fmt

internal/api/client/admin/domainblockget.go

@@ -10,6 +10,40 @@ import (
 )
 
 // DomainBlockGETHandler returns one existing domain block, identified by its id.
+//
+// swagger:operation GET /api/v1/admin/domain_blocks/{id} domainBlockGet
+//
+// View domain block with the given ID.
+//
+// ---
+// tags:
+// - admin
+//
+// produces:
+// - application/json
+//
+// parameters:
+// - name: id
+//   type: string
+//   description: The id of the domain block.
+//   in: path
+//   required: true
+//
+// security:
+// - OAuth2 Bearer:
+//   - admin
+//
+// responses:
+//   '200':
+//     description: The requested domain block.
+//     schema:
+//       "$ref": "#/definitions/domainBlock"
+//   '403':
+//      description: forbidden
+//   '400':
+//      description: bad request
+//   '404':
+//      description: not found
 func (m *Module) DomainBlockGETHandler(c *gin.Context) {
 	l := m.log.WithFields(logrus.Fields{
 		"func":        "DomainBlockGETHandler",