test: refactor test-tls-0-dns-altname

* var -> const, let
* assert.equal() -> assert.strictEqual()
PR-URL: #9948
Reviewed-By: Teddy Katz <teddy.katz@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Richard Karmazin

test/parallel/test-tls-0-dns-altname.js

@@ -1,16 +1,16 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
+constcommon=require('../common');
+constassert=require('assert');
 
 if(!common.hasCrypto){
 common.skip('missing crypto');
 return;
 }
-vartls=require('tls');
+consttls=require('tls');
 
-varfs=require('fs');
+constfs=require('fs');
 
-varserver=tls.createServer({
+constserver=tls.createServer({
 key: fs.readFileSync(common.fixturesDir+'/keys/0-dns-key.pem'),
 cert: fs.readFileSync(common.fixturesDir+'/keys/0-dns-cert.pem')
 },function(c){
@@ -19,16 +19,16 @@ var server = tls.createServer({
 server.close();
 });
 }).listen(0,common.mustCall(function(){
-varc=tls.connect(this.address().port,{
+constc=tls.connect(this.address().port,{
 rejectUnauthorized: false
 },common.mustCall(function(){
-varcert=c.getPeerCertificate();
-assert.equal(cert.subjectaltname,
-'DNS:google.com\0.evil.com, '+
-'DNS:just-another.com, '+
-'IP Address:8.8.8.8, '+
-'IP Address:8.8.4.4, '+
-'DNS:last.com');
+constcert=c.getPeerCertificate();
+assert.strictEqual(cert.subjectaltname,
+'DNS:google.com\0.evil.com, '+
+'DNS:just-another.com, '+
+'IP Address:8.8.8.8, '+
+'IP Address:8.8.4.4, '+
+'DNS:last.com');
 c.write('ok');
 }));
 }));