o Minor features:
    - If set to 1, Tor will attempt to prevent basic debugging attachment
      attempts by other processes. It has no impact for users who wish to
      attach if they have CAP_SYS_PTRACE or if they are root.  We believe that
      this feature works on modern Gnu/Linux distributions, and that it may
      also work on *BSD systems (untested).  Some modern Gnu/Linux systems such
      as Ubuntu have the kernel.yama.ptrace_scope sysctl and by default enable
      it as an attempt to limit the PTRACE scope for all user processes by
      default. This feature will attempt to limit the PTRACE scope for Tor
      specifically - it will not attempt to alter the system wide ptrace scope
      as it may not even exist. If you wish to attach to Tor with a debugger
      such as gdb or strace you will want to set this to 0 for the duration of
      your debugging. Normal users should leave it on. (Default: 1)