examples: asio ssl example demonstrating both server and client

By default it uses simple client connecting to https address. It is
possible to configure both server and client. As for example test the
configuration of both server and client connecting to each other on


* Original commit: espressif/esp-idf@213bbe51fc

examples/protocols/asio/ssl_client_server/main/Kconfig.projbuild

@@ -0,0 +1,28 @@
+menu "Example Configuration"
+
+    config EXAMPLE_CLIENT
+        bool "Enable TLS client"
+        default y
+        help
+            Choose this option to use ASIO TLS/SSL client functionality
+
+    config EXAMPLE_PORT
+        string "ASIO port number"
+        default "443"
+        help
+            Port number used by ASIO example.
+
+    config EXAMPLE_SERVER
+        bool "Enable TLS server"
+        default n
+        help
+            Choose this option to use ASIO TLS/SSL server functionality
+
+    config EXAMPLE_SERVER_NAME
+        string "ASIO server name or IP"
+        default "www.google.com"
+        depends on EXAMPLE_CLIENT
+        help
+            Asio example server ip for the ASIO client to connect to.
+
+endmenu