fix: use –locked with cargo install in debian/rules

Signed-off-by: Lars Wirzenius liw@liw.fi

feat: add –version option

Signed-off-by: Lars Wirzenius liw@liw.fi

feat: add –show-config to write out configuration as JSON

Signed-off-by: Lars Wirzenius liw@liw.fi

feat: allow an optional base URL in the configuration file

Signed-off-by: Lars Wirzenius liw@liw.fi

feat: return URL to build log if base URL is configured

Signed-off-by: Lars Wirzenius liw@liw.fi