Boost 1.53.0

[Petr Machata]

Hi there,

as every release, we (the Boost maintainers) intend to rebase Boost for
Fedora 19.  The targeted release is 1.53.0.  The plan is outlined on the
feature page [1].

Boost 1.53 is not out yet (it will be on February 4).  Beta is out, but
I don't think it's a good idea to rebase to that.  With Boost, there's
no guarantee that the ABI will stay stable from beta to final.  We would
have to review whether any ABI-breaking changes were made, which is
annoying enough by itself, and we would possibly end up re-rebuilding
clients anyway.  So while we may _package_ beta (for purposes of local
testing, scratch builds and such), I don't think we should push it to
Rawhide.

I'll write again when things progress further.

Thanks,
PM

[1] https://fedoraproject.org/wiki/Features/F19Boost153