fixing some naming and typos that caused wrong value to be updated (#…

…13031)

Motivation:

I accidentally find some typos in the transport-udt module, and two of them actually can affect the correctness of execution.

Modification:

Only changed some variable namings.
Variables in some setters in DefaultUdtChannelConfig.java and DefaultUdtServerChannelConfig.java are named incorrectly.

Result:

Now, DefaultUdtChannelConfig won't set SystemReceiveBufferSize and SystemSendBufferSize incorrectly.

transport-udt/src/main/java/io/netty/channel/udt/DefaultUdtChannelConfig.java

@@ -214,7 +214,7 @@ public int getSystemReceiveBufferSize() {
     }
 
     @Override
-    public UdtChannelConfig setSystemSendBufferSize(
+    public UdtChannelConfig setSystemReceiveBufferSize(
             final int systemReceiveBufferSize) {
         this.systemReceiveBufferSize = systemReceiveBufferSize;
         return this;
@@ -233,7 +233,7 @@ public UdtChannelConfig setProtocolSendBufferSize(
     }
 
     @Override
-    public UdtChannelConfig setSystemReceiveBufferSize(
+    public UdtChannelConfig setSystemSendBufferSize(
             final int systemSendBufferSize) {
         this.systemSendBufferSize = systemSendBufferSize;
         return this;

transport-udt/src/main/java/io/netty/channel/udt/DefaultUdtServerChannelConfig.java

@@ -128,15 +128,15 @@ public UdtServerChannelConfig setSoLinger(final int soLinger) {
 
     @Override
     public UdtServerChannelConfig setSystemReceiveBufferSize(
-            final int systemSendBufferSize) {
-        super.setSystemReceiveBufferSize(systemSendBufferSize);
+            final int systemReceiveBufferSize) {
+        super.setSystemReceiveBufferSize(systemReceiveBufferSize);
         return this;
     }
 
     @Override
     public UdtServerChannelConfig setSystemSendBufferSize(
-            final int systemReceiveBufferSize) {
-        super.setSystemSendBufferSize(systemReceiveBufferSize);
+            final int systemSendBufferSize) {
+        super.setSystemSendBufferSize(systemSendBufferSize);
         return this;
     }