[SECURITY] Fedora 26 Update: postgresql-9.6.4-1.fc26

PostgreSQL is an advanced Object-Relational database management system (DBM S). The base postgresql package contains the client programs that you’ll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.