Snippets for xscreensaver 6.16 from FreeBSD 151amd64

Sourced from https://pkg-status.freebsd.org/beefy23/data/latest-per-pkg/xscreensaver/6.16/151amd64-default.log.

• /usr/include/sys/termios.h:2:2: warning: "this file includes <sys/termios.h> which is deprecated, use <termios.h> instead" [-W#warnings]
      2 | #warning "this file includes <sys/termios.h> which is deprecated, use <termios.h> instead"
        |  ^