Packeteer is a library that can handle structurally organising protocol packets like HTTP 1.x requests and responses as well as generating, structuring, unpacking and potentially more features depending on the protocol.
This library changed from the LGPLv3 to MPLv2 as a result of LGPL's requirements for freedom of source on static linking which rustc does.
I've chosen to use the MPL as it is a weaker but still copyleft license that allows you to statically link.
The MPL applies retroactively to all previous versions of this library and will be used for all future versions.