Revert "Support additional tls.connect() options (#1996)" (#2010)

This reverts commit bf029c8.

lib/connection.js

@@ -91,9 +91,18 @@ Connection.prototype.connect = function (port, host) {
         return self.emit('error', new Error('There was an error establishing an SSL connection'))
     }
     var tls = require('tls')
-    const options = Object.assign({
-      socket: self.stream
-    }, self.ssl)
+    const options = {
+      socket: self.stream,
+      checkServerIdentity: self.ssl.checkServerIdentity || tls.checkServerIdentity,
+      rejectUnauthorized: self.ssl.rejectUnauthorized,
+      ca: self.ssl.ca,
+      pfx: self.ssl.pfx,
+      key: self.ssl.key,
+      passphrase: self.ssl.passphrase,
+      cert: self.ssl.cert,
+      secureOptions: self.ssl.secureOptions,
+      NPNProtocols: self.ssl.NPNProtocols
+    }
     if (net.isIP(host) === 0) {
       options.servername = host
     }