1A few things that could be hacked on.
 2
 3The regex cluster to rewrite noise is an unholy horror of side effects.
 4
 5Remove httpsig key fetching from the input path.
 6	If the key is known, check signature and reply 200 or 401.
 7	If the key is unknown, immediately reply 202 and process later.
 8
 9The gob encoding for backend rpc uses more memory than needed.
10	A custom encoding could reduce allocations.
11	Maybe the backend could fetch the data itself.
12
13