Also remove the redundant URL in the footer and the redundant
"General Commands Manual" text (scdoc adds that by default based on the
section it seems).
- Remove recommendation of XKB_* environment variables in river(1) as we
now have a dedicated riverctl keyboard-layout command.
- Give an example of how to use and switch between multiple layouts in
the riverctl(1) man page.
This doesn't really matter that much as unrecognized options will still
trigger a help message to be printed, but -h is much more standard so
lets make the predictable choice here while sticking to only single '-'
flags.
A true "default" config doesn't make sense for river. Everyone who uses
river seriously will customize their init script. Futhermore, the
current behavior of embedding the install path of the default system
config in the river binary is complex and prone to breaking.
Run the init command in a new process group and send SIGTERM to the
entire group on exit. Without doing this, only the sh invocation used
for the `sh -c` would receive SIGTERM.
This is particularly useful when starting a per-session server manager
as the init command.
