Add unofficial_url to node/releases.conf and update the nodedist
fetcher/classifier to fetch from both URLs. Raw entries are stored
with "official/" or "unofficial/" tag prefixes so they don't overwrite
each other. The classifier picks the correct base URL from the prefix.
This matches the Node.js releases.js behavior which merges both sources,
adding musl, riscv64, loong64, and 7z builds from unofficial.
New fetcher packages:
- chromedist: Chrome for Testing API (googlechromelabs.github.io)
- gpgdist: SourceForge RSS for GPG macOS
- mariadbdist: MariaDB downloads REST API
New releases.conf files for:
- GitHub: aliasman, awless, duckdns.sh, hugo-extended, kubens, rg, postgres
- gittag: vim-commentary, vim-zig
- gitea: pathman
- chromedist: chromedriver
- gpgdist: gpg
- mariadbdist: mariadb
- nodedist: node
Alias support (alias_of key):
- golang → go, dashd → dashcore, psql → postgres, zig.vim → vim-zig
- Aliases skip fetching and share cache with their target
Every package with a releases.js now has a releases.conf (except the
dead macos package). fetchraw dispatches to all 13 source types.
