more clean

System_Calls/readme.md

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+# System Calls :
+
+Below are the system calls that can be used to access network functionality.
+
+* **getaddrinfo()** :
+  
+  * Function prototye
+
+    ```
+    int getaddrinfo(const char *node,  // e.g. "www.example.com" or IP
+                    const char *service, // e.g. "http" or port number
+                    const struct addrinfo *hints,
+                    struct addrinfo **res);
+    ```
+
+    1. node :
+
+        Type : `const char *`