removing duplicate impls

[Bernhard Reutner-Fischer]

On Thu, Dec 11, 2008 at 02:17:53AM +0100, Denys Vlasenko wrote:
>On Tuesday 09 December 2008 22:00, Rob Landley wrote:
>> Right now, there are still two "old" linuxthreads branches in uClibc, and as 
>> far as I can tell we'll be supporting them in perpetuity.  (For a definition 
>> of "support" that involves leaving them alone unless somebody complains.)  
>
>We need to stop doing that, though.
>
>We have "ond" and "new" vfprintf, "old" and "new" regex,
>"old" and "new" threads, "old" and "new" fnmatch.
>
>Let's just decide on something, and disable things which are
>really "old". Because currently, I need telepathic powers
>to figure out which regex to choose:
>
>Sometimes "old" is actually old and better be dropped,
>other times "old" is actually "stable and recommended",
>and "new" is "work in progress, and maybe developer was hit
>by the bus, nobody knows". For one, I do not know
>what vfprintf or regex to choose, I use rand().
>
>But users are even less likely than we to know what to choose.
>We, as developers, need to help them.
>
>It's not like disabling or even rm'ing one or the other
>is irreversible. It all will still be in a history.
>
>Just IMHO. Bernhard, I guess it's up to you to decide this.

Let's leave the complete libpthread/* out of this particular discussion
for now.

As for the rest, i currently don't have a strong opinion on which
of the old or new variants to keep, which malloc impl (of the 3) to
drop. I'm open to suggestions.

Any preferences / thoughts?