math/rand/v2: document PCG and ChaCha8 tradeoffs

Document that ChaCha8 is the general-purpose source resistant to
prediction, and that PCG is faster but unfit for security-relevant
purposes.

Fixes #79891

Change-Id: Ic4133dd9bd860c2643c622f799f2c54b1678e4f0
GitHub-Last-Rev: 93d225108aaef7862f4f148cd926f420e58af831
GitHub-Pull-Request: golang/go#79926
Reviewed-on: https://go-review.googlesource.com/c/go/+/789040
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
1 file changed
tree: b2b85cafc078562ae99f3200bf7f29a2dc213512
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
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