How to list ALL PostgreSQL functions?

[Poul Kristensen <bcc5226@xxxxxxxxx>]

Hi !

How do I get an overview of all functions in the PG api 

e.g. : 

posgres=# SELECT pg_last_xlog_receive_location();

postgres=# SELECT pg_current_xlog_location();

In my opinion it is not obvious how to list all pg_* functions.

Can anyone help?

Thanks

Poul