The *first (front matter) page* of the Contributor's Guide manual
(version 2.19.23, in the second paragraph) refers people to a very
important section, 'Help Us' located in another manual:
the Web/General Information manual.
Here's the front matter text I'm talking about:
This manual documents contributing to LilyPond version 2.19.23. It
discusses technical issues and policies that contributors should
follow.
This manual is not intended to be read sequentially; new
contributors
should only read the sections which are relevant to them. For more
information about different jobs, see _*Help us*_.
The link in the last two words, above—`*Help us*'—goes to: