AFNetworking/AFNetworking — pull request #2371 by getaaron (2014-10-19 19:40:15+00:00)
Title: There can be only one background session

This commit updates the documentation to more clearly state the expected usage of session managers that have background sessions. See https://github.com/AFNetworking/AFNetworking/issues/2370 for an example of confusion around this issue.