[PATCH] intl: reintroduce unintentionally disabled optimization

[Florian Weimer]

* Dmitry V. Levin:

>> Is config.h.in regenerated by autoreconf and similar tools?
>
> No, it's supported manually and therefore permanently out of sync.
> For example,
>
> $ grep -i strerror config.h.in 
> #undef	HAVE_STRERROR
> #define	HAVE_STRERROR	1
> find -name configure.ac | xargs grep -i strerror | wc -l
> 0

Can we have autoreconf automatically generate config.h.in, like other
GNU projects do?