[RFA/doc] Mention fork/exec catchpoints for GNU/Linux

[Mark Kettenis]

> Date: Wed, 30 Jan 2008 13:44:24 -0500
> From: Daniel Jacobowitz <drow@false.org>
> 
> On Wed, Jan 30, 2008 at 07:37:44PM +0100, Mark Kettenis wrote:
> > Hey, catch fork/vfork is supported on OpenBSD too!  I'll submit a
> > follow-on diff once Daniel's gets committed ;).
> 
> Are you sure catch vfork works?  Nothing in inf-ptrace.c generates
> TARGET_WAITKIND_VFORKED - looks like I searched for that instead of
> ..._FORKED.

Heh, it doesn't.  I rmember now that the vfork semantics made things a
little bit difficult, and that I didn't add support for it in the
kernel.