The version of Recast that Blender ships with is from 2009. This patch updates the Recast version to the latest version, 1.5.0. The Detour version remains untouched.
As discussed on IRC, I'd like to see a file describing what versions the different libraries are at. It would also be nice to know any modifications (e.g., the inclusion of a C API) that needed to be made to the libraries so that those modifications can be re-applied in future updates as well.
This type of change is probably best suited for BCon1, and we are currently in BCon3. As long as Campbell doesn't object and the earlier mentioned file is added, I am okay with landing this patch the next time we hit BCon1. Since, from what I can tell, this isn't a heavily used feature, we may be able to squeeze this in during BCon3, but that would require an okay from Campbell.