* update docs for Perl retirement
With the retirement of Perl and the inclusion of tunneling in the base
build, there are several steps and warnings that no longer apply. These
have been removed from the docs.
* add tunnel.wanonly description
* update slider screenshot
Set the trademark macro once as a prolog to all RST files. Reduces the
possibility of error by removing the requirement for the trademark macro
within every RST.
* Add clear browser cache to firmware install section
Add a paragraph explaining why clearing the web browser cache may be
required during firmware installs.
* Update link types graphic
Update link types graphic
* Update backbone diagram
Update backbone link on topology diagram
* Update backbone diagram