Due to a hint from the Mozilla developers, we discovered that we do not need the
libabsyncsvc.so (absyncsv.dll) library - it contains code which is not (and
never was) used for our address book integration.
We should remove it from the tarballs to save space.

Sean, when you deal with this, please care for what John reminded us:
<cite>
> remember you will need to renegerate the mozilla register if we
> remove this component and probably provide a new xpti.dat.

> And update Colm's doc on the website!
</cite>

Additionally, we should announce this change (when it's done) on the porting
list, to let the porters know that they can remove this from their tarballs, too.