bug#17246: grep-2.19 planning

[Paul Eggert]

Paolo Bonzini wrote:
> I'm not sure that the complexity of C programs will be smaller than the
> complexity of grep <=2.18's machinery.

Unfortunately that machinery wasn't clearly separated from everything 
else, and this was confusing.  Having it be a separate script will make 
it clearer.  A nice plus is that the scripts are tiny.

> One remaining problem with C wrappers is that they make the grep
> installation non-relocatable and "non-separable".

They are still relocatable in the sense that if you move grep + egrep + 
fgrep together to some other directory, they'll continue to work 
together in the typical case.  That's good enough for a hack to support 
an obsoleted interface.