Tcl8.3 upgrade, Expect patch.

[Ian Roxborough]

Hi,

I'm seeking approval to check in the following changes
to Expect:

- Changes to support Tcl8.3 API (Tcl8.0 will still work).
- Move Tcl8.0 regexp into Expect.
- Move some of Tcl8.0's tclParse.c into Expect.

These changes make Expect Tcl version independent, without
us having to worry about rewriting any regular expressions.
Once these changes are in place the Tcl8.3 upgrade can go
mostly unnoticed.

You can find a patch and the new files in this tarball:

http://www.cygnus.com/~irox/expect/expect-update.tar

Any questions/feedback/comments are welcome.

Thanks,

  Ian.