first commit for openGauss connector jdbc

docs/documentation/93/ssl.md

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+---
+layout: default_docs
+title: Chapter 4. Using SSL
+header: Chapter 4. Using SSL
+resource: media
+previoustitle: Connecting to the Database
+previous: connect.html
+nexttitle: Configuring the Client
+next: ssl-client.html
+---
+
+**Table of Contents**
+
+* [Configuring the Server](ssl.html#ssl-server)
+* [Configuring the Client](ssl-client.html)
+	* [Using SSL without Certificate Validation](ssl-client.html#nonvalidating)
+* [Custom SSLSocketFactory](ssl-factory.html)
+
+<a name="ssl-server"></a>
+# Configuring the Server
+
+Configuring the PostgreSQL™ server for SSL is covered in the [main
+documentation](http://www.postgresql.org/docs/current/static/ssl-tcp.html),
+so it will not be repeated here. Before trying to access your SSL enabled
+server from Java, make sure you can get to it via **psql**. You should
+see output like the following if you have established a SSL  connnection. 
+
+`$ ./bin/psql -h localhost`  
+`Welcome to psql 8.0.0rc5, the PostgreSQL interactive terminal.`
+
+`Type: \copyright for distribution terms`  
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`\h for help with SQL commands`  
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`\? for help with psql commands`  
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`\g or terminate with semicolon to execute query`  
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`\q to quit`
+
+`SSL connection (cipher: DHE-RSA-AES256-SHA, bits: 256)`