HEADS UP: pts code committed

Hi all,

Robert Watson and myself have been working on a pts implementation, ala
SysV/linux, for quite some time, and it finally went into the source tree.
It does not replace the BSD-style pty however, and one can switch from one
implementation to another by changing the kern.pts.enable sysctl. It defaults
to the BSD-style ptys.
It is not supposed to break anything, old program which only know about the
BSD ptys should still work fine. however if it does, or if any other
pts-related bug hurts you, please report it to me.

Thanks,

Olivier