approaching 4.5.21 release

[Roland McGrath]

> While the change in -f implementation to use PTRACE_GETEVENTMSG&Co is major
> internal change, I'm not sure how to "sell" it to regular users.
> All I could think of is to write a NEWS entry like this:
> * Implemented a new method of following clone, fork, and vfork
>   syscalls using Linux PTRACE_GETEVENTMSG interface.

If one were to refer to a Linux symbol name, I would say PTRACE_O_TRACECLONE.
But I would be inclined to say something slightly less technical, like "using
the Linux kernel's explicit facilities for tracing thread and child
creation".


Thanks,
Roland