Incorrect description of autovacuum_vacuum_threshold andautovacuum_vacuum_scale_factor

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/10/static/runtime-config-autovacuum.html
Description:

This page lists the different autovacuum options. Describing
autovacuum_vacuum_threshold and autovacuum_vacuum_scale_factor independently
adds confusion unless you are also reading
https://www.postgresql.org/docs/10/static/routine-vacuuming.html#AUTOVACUUM
where we have a formula for the threshold and scale factor.

I suggest adding a reference for each one of the two parameters with a link
to the "Routine Vacuuming" section.