Jim Posen

ACK BIP 157

I'm in support of this, perhaps requiring sign off from multiple BIP contributors (not necessarily the BIP author) that the meaning is unchanged, [as suggested by cdecker](https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-September/015083.html).

Handled all comments that don't have an explicit reply.

Thoughts on `application/lightning-invoice` or `application/ln-invoice`? `application/lightning` doesn't feel specific enough. For example, maybe there will be a reason to transport raw LN messages like node_announcements or channel_announcements in a context...

Thanks for the fast reply! That makes sense, as a workaround I used ```python np.reciprocal.at(x, np.nonzero(x)) ```