Revert "tls: allow wildcards in common name"

This reverts commit 45024e7.

It's making test/simple/test-tls-check-server-identity.js fail:

  AssertionError: Test#4 failed: { host: 'b.a.com',
    cert: { subject: { CN: '*.a.com' } },
    result: false }
      at <omitted>/test/simple/test-tls-check-server-identity.js:201:10

lib/tls.js

@@ -156,13 +156,14 @@ function checkServerIdentity(host, cert) {
     dnsNames = dnsNames.concat(uriNames);
 
     // And only after check if hostname matches CN
+    // (because CN is deprecated, but should be used for compatiblity anyway)
     var commonNames = cert.subject.CN;
     if (Array.isArray(commonNames)) {
       for (var i = 0, k = commonNames.length; i < k; ++i) {
-        dnsNames.push(regexpify(commonNames[i], true));
+        dnsNames.push(regexpify(commonNames[i], false));
       }
     } else {
-      dnsNames.push(regexpify(commonNames, true));
+      dnsNames.push(regexpify(commonNames, false));
     }
 
     valid = dnsNames.some(function(re) {