Code optimization #521. README update.

Author: TikhomirovSergey

README.md

@@ -129,6 +129,7 @@ You can get it on [WIKI](https://github.com/appium/java-client/wiki)
 - **[UPDATE]** to Selenium 3.0. [#489](https://github.com/appium/java-client/pull/489)
 - [ENHANCEMENT]. Additional methods which perform device rotation were implemented. [#489](https://github.com/appium/java-client/pull/489). [#439](https://github.com/appium/java-client/pull/439). But it works only for iOS in XCUIT mode. The feature request: [#7131](https://github.com/appium/appium/issues/7131) 
 - [ENHANCEMENT]. TouchID Implementation (iOS Sim Only). Details: [#509](https://github.com/appium/java-client/pull/509)
+- [ENHANCEMENT]. The ability to use port, ip and log file as server arguments was provided. Feature request: [#521](https://github.com/appium/java-client/issues/521). Fixes: [#522](https://github.com/appium/java-client/issues/522), [#524](https://github.com/appium/java-client/issues/524).
 - [BUG FIX]: There was the issue when "@WithTimeout" was changing general timeout of the waiting for elements. Bug report: [#467](https://github.com/appium/java-client/issues/467). Fixes: [#468](https://github.com/appium/java-client/issues/468), [#469](https://github.com/appium/java-client/issues/469), [#480](https://github.com/appium/java-client/issues/480). Read: [supported-settings](https://github.com/appium/appium/blob/master/docs/en/advanced-concepts/settings.md#supported-settings)
 - Added the server flag `io.appium.java_client.service.local.flags.AndroidServerFlag#REBOOT`. [#476](https://github.com/appium/java-client/pull/476)
 - Added `io.appium.java_client.remote.AndroidMobileCapabilityType.APP_WAIT_DURATION ` capability. [#461](https://github.com/appium/java-client/pull/461)

src/main/java/io/appium/java_client/service/local/AppiumServiceBuilder.java

@@ -238,11 +238,11 @@ public AppiumServiceBuilder withArgument(ServerArgument argument) {
      */
     public AppiumServiceBuilder withArgument(ServerArgument argument, String value) {
         String argName = argument.getArgument().trim().toLowerCase();
-        if ("--port".equalsIgnoreCase(argName) || "-p".equalsIgnoreCase(argName)) {
+        if ("--port".equals(argName) || "-p".equals(argName)) {
             usingPort(Integer.valueOf(value));
-        } else if ("--address".equalsIgnoreCase(argName) || "-a".equalsIgnoreCase(argName)) {
+        } else if ("--address".equals(argName) || "-a".equals(argName)) {
             withIPAddress(value);
-        } else if ("--log".equalsIgnoreCase(argName) || "-g".equalsIgnoreCase(argName)) {
+        } else if ("--log".equals(argName) || "-g".equals(argName)) {
             withLogFile(new File(value));
         } else {
             serverArguments.put(argName, value);