This makes our final balance not match our wallet:
1. We only spend the anchor when we need to boost the commitment tx,
which we don't always do (sometimes the peer does, sometimes it's
not worth it).
2. We don't put the UTXO in our wallet, because we don't consider it
"ours": anyone can spend it after 16 blocks.
We used to use the tag "ignored" for this, but that's overly complex
IMHO.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
aee7ebbeef