[gPXE] script exceptions

[Miller, Shao]

Good day again Binh,

In regards to your query about gPXE's behaviour of "erroring-out" of all
scripts upon a single command's failure, there was some discussion in
the gPXE developers' mailing-list[1] in regards to this.

As of this time, the code offered in the reference[1] is one possible
option, but nothing has yet been committed to gPXE's official codebase
to deal with this.

- Shao Miller

[1] http://etherboot.org/pipermail/gpxe-devel/2010-March/000083.html