BUG #16628: Hostame and string connection functions

The following bug has been logged on the website:

Bug reference:      16628
Logged by:          Anderson Antunes
Email address:      anderson.ant.oli@gmail.com
PostgreSQL version: 9.5.0
Operating system:   Linux
Description:

Hi,

Is there any possibility of developing a function to retrieve hostname and
the connection string?

Example:

select get_host_name ();
select get_string_connection ();