Node.js pads Go versions like "1.10" to "1.10.0". Match this behavior
in the classifier and comparecache version normalizer. Also filter
-arm6. malformed arch and .src. source tarballs from comparison noise.
Match count: 73/106
Git for Windows uses tags like v2.53.0.windows.1. Node.js strips
".windows.1" and replaces ".windows.N" (N>1) with ".N".
Add NormalizeVersions to the git package and wire it into the classify
pipeline. Also add version normalization to comparecache so the
comparison uses canonical versions for both caches.
Remaining git diffs: data freshness (.windows.2 releases Go hasn't
fetched) and RC versions in Go that live doesn't have.
Move all source-specific classifiers, variant tagging, config filtering,
and readAllRaw out of cmd/webicached into internal/classifypkg. The new
Package() function runs the full classify pipeline: source dispatch →
tag variants → apply config.
webicached now only handles fetching raw data and writing to fsstore.
The classification logic is reusable by comparecache and future tools.
