The general documentation on configuring repositories previously was

somewhat dense. A couple of paragraphs that highlighted a bunch of

important, but somewhat buried, information, and a paragraph that had no

business being there (likely a copy/paste), since it really belonged to

the auto-fetching section.
Neither section broke down the configuration options, or really guided

users toward setting up API tokens. They expected a bit of knowledge

that users may lack.
This change redoes the documentation, breaking it up into less-dense

paragraphs, specifically calling out the supported repository types, and

providing a list of each option for the worker configuration and what's

allowed or expected for both ways of configuring repositories.
An "important" callout box was added for the information on the

repository configuration on the Review Board side, for auto-fetching of

repositories, to help make this really stand out. Example scenarios and

a pointer to RB Gateway was added. The copy of the original version of

this information was removed from the manual section.
Section headers have also been renamed to help differentiate the two,

and reference names have been added to some sections in the file.

Built the docs and read through them. Checked for spelling errors, bad

links, and build errors.