Broken links fixed

Author: pritamso

articles/postgresql/single-server/concepts-connection-libraries.md

@@ -21,7 +21,7 @@ Most language client libraries used to connect to PostgreSQL server are external
 
 | **Language** | **Client interface** | **Additional information** | **Download** |
 |--------------|----------------------------------------------------------------|-------------------------------------|--------------------------------------------------------------------|
-| Python | [psycopg](http://initd.org/psycopg/) | DB API 2.0-compliant | [Download](http://initd.org/psycopg/download/) |
+| Python | [psycopg](https://www.psycopg.org/) | DB API 2.0-compliant | [Download](https://sourceforge.net/projects/adodbapi/) |
 | PHP | [php-pgsql](https://secure.php.net/manual/en/book.pgsql.php) | Database extension | [Install](https://secure.php.net/manual/en/pgsql.installation.php) |
 | Node.js | [Pg npm package](https://www.npmjs.com/package/pg) | Pure JavaScript non-blocking client | [Install](https://www.npmjs.com/package/pg) |
 | Java | [JDBC](https://jdbc.postgresql.org/) | Type 4 JDBC driver | [Download](https://jdbc.postgresql.org/download.html)  |