Address review comments

docs/en/writing-running-appium/server-args.md

@@ -92,3 +92,5 @@ All flags are optional, but some are required in conjunction with certain others
 |`--localizable-strings-dir`|en.lproj|[DEPRECATED] - (IOS-only) the relative path of the dir where Localizable.strings file resides |`--localizable-strings-dir en.lproj`|
 |`--show-ios-log`|false|[DEPRECATED] - (IOS-only) if set, the iOS system log will be written to the console||
 |`--enable-heapdump`|false|Enables NodeJS memory dumps collection feature. This feature is extremely useful for finding memory leaks. Use the 'kill -SIGUSR2 <PID>' command to create a dump of memory heap for _node_ process with the particular PID (this works for *nix systems only). The dump file will be created in the same folder, where main Appium script was executed and will have *.heapsnapshot extension. These snapshot can be then loaded to Chrome Inspector for further investigation. Read the [Rising Stack article](https://blog.risingstack.com/finding-a-memory-leak-in-node-js/) for more details.||
+|`--relaxed-security`|false|Disable additional security checks, so it is possible to use some advanced features, provided
+by drivers supporting this option. Only enable it if all the clients are in the trusted network and it is not the case if a client could potentially break out of the session sandbox.||

lib/appium.js

@@ -29,10 +29,8 @@ class AppiumDriver extends BaseDriver {
     this.newCommandTimeoutMs = 0;
 
     this.args = Object.assign({}, args);
-    if (this.args.relaxedSecurityEnabled) {
-      this.relaxedSecurityEnabled = true;
-      delete this.args.relaxedSecurityEnabled;
-    }
+
+    this.relaxedSecurityEnabled = this.args.relaxedSecurityEnabled;
 
     // Access to sessions list must be guarded with a Semaphore, because
     // it might be changed by other async calls at any time
@@ -194,6 +192,7 @@ class AppiumDriver extends BaseDriver {
     let runningDriversData, otherPendingDriversData;
     let d = new InnerDriver(this.args);
     if (this.relaxedSecurityEnabled) {
+      log.info(`Applying relaxed security to ${InnerDriver.name} as it has been enabled via the command line`);
       d.relaxedSecurityEnabled = true;
     }
     try {