[Tile-serving] [osm2pgsql] Replace pthread and boost::thread with std::async (#498)

[Sarah Hoffmann]

Merged #498.

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/498#event-463991098
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tile-serving/attachments/20151113/2bb0e84c/attachment.html>