Is called like this since 14321ae2431e33f5ed81f1ee43eddd29c7e9d01d, but
docs were still using the old option in some cases.
Reported-By: Cedric Shahabi <cedric.shahabi@gmail.com>
Add link to "Configuration" chapter from "Changing the Configuration" section.
Also, fix grammar error.
(cherry picked from commit a585f987fa32f2e81b3f273291971151c25f98b7)
* manual: Mark commands that require root
Mark every command that requires to be run as root by prefixing them
with '#' instead of '$'.
* manual: Add note about commands that require root