Add check type manual.

Results of manual checks are forced to WARN to inform users to check manually.

check/check.go

@@ -60,6 +60,7 @@ type Check struct {
 	ID          string `yaml:"id" json:"id"`
 	Text        string
 	Audit       string      `json:"omit"`
+	Type        string      `json:"type"`
 	Commands    []*exec.Cmd `json:"omit"`
 	Tests       *tests      `json:"omit"`
 	Set         bool        `json:"omit"`
@@ -70,6 +71,12 @@ type Check struct {
 // Run executes the audit commands specified in a check and outputs
 // the results.
 func (c *Check) Run(verbose bool) {
+	// If check type is manual, force result to WARN.
+	if c.Type == "manual" {
+		c.State = WARN
+		return
+	}
+
 	var out bytes.Buffer
 	var errmsgs string