examples/http_client*: Be sure to close socket.

Otherwise, on bare-metal/RTOS systems can lead to resource leaks.

examples/network/http_client.py

@@ -24,5 +24,7 @@ def main(use_stream=False):
         s.send(b"GET / HTTP/1.0\n\n")
         print(s.recv(4096))
 
+    s.close()
+
 
 main()

examples/network/http_client_ssl.py

@@ -32,5 +32,7 @@ def main(use_stream=True):
         s.send(b"GET / HTTP/1.0\n\n")
         print(s.recv(4096))
 
+    s.close()
+
 
 main()