[PATCH] configure: check whether shell is capable of parameter substring processing

[David Bremner]

Tomi Ollila <tomi.ollila at iki.fi> writes:

> 'configure' script uses parameter substring extensively. It is Posix shell
> feature. Original Bourne shell does not have such features. Some systems
> still ships such shells as /bin/sh (for compatibility reasons -- shell
> scripts written on those platforms are expected to work on 1990's systems).

pushed, finally.

d