Revert "plugin/tls: respect the path specified by root plugin (#5944)" (#6136)

This reverts commit d0375bc026.

plugin/etcd/setup.go

@@ -2,7 +2,6 @@ package etcd
 
 import (
 	"crypto/tls"
-	"path/filepath"
 
 	"github.com/coredns/caddy"
 	"github.com/coredns/coredns/core/dnsserver"
@@ -30,7 +29,6 @@ func setup(c *caddy.Controller) error {
 }
 
 func etcdParse(c *caddy.Controller) (*Etcd, error) {
-	config := dnsserver.GetConfig(c)
 	etc := Etcd{PathPrefix: "skydns"}
 	var (
 		tlsConfig *tls.Config
@@ -68,11 +66,6 @@ func etcdParse(c *caddy.Controller) (*Etcd, error) {
 				c.RemainingArgs()
 			case "tls": // cert key cacertfile
 				args := c.RemainingArgs()
-				for i := range args {
-					if !filepath.IsAbs(args[i]) && config.Root != "" {
-						args[i] = filepath.Join(config.Root, args[i])
-					}
-				}
 				tlsConfig, err = mwtls.NewTLSConfigFromArgs(args...)
 				if err != nil {
 					return &Etcd{}, err