Switch to v3 of github.com/emicklei/go-restful

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

vendor/github.com/emicklei/go-restful/v3/custom_verb.go

@@ -0,0 +1,29 @@
+package restful
+
+import (
+	"fmt"
+	"regexp"
+)
+
+var (
+	customVerbReg = regexp.MustCompile(":([A-Za-z]+)$")
+)
+
+func hasCustomVerb(routeToken string) bool {
+	return customVerbReg.MatchString(routeToken)
+}
+
+func isMatchCustomVerb(routeToken string, pathToken string) bool {
+	rs := customVerbReg.FindStringSubmatch(routeToken)
+	if len(rs) < 2 {
+		return false
+	}
+
+	customVerb := rs[1]
+	specificVerbReg := regexp.MustCompile(fmt.Sprintf(":%s$", customVerb))
+	return specificVerbReg.MatchString(pathToken)
+}
+
+func removeCustomVerb(str string) string {
+	return customVerbReg.ReplaceAllString(str, "")
+}