v0.37.2 — the broker forwards to its provider only

What's Changed

• fix(broker): refuse a request-target that re-homes the upstream (for 0.37.2) by @vkurenkov in #107
• docs: every page rewritten and verified against the code (for 0.37.2) by @vkurenkov in #108
• Release 0.37.2: the broker forwards to its provider only by @vkurenkov in #109

Full Changelog: v0.37.1...v0.37.2