net/http: speed up cookie and method validation
Fixes #67031
Change-Id: I1d764afdc7e50d61007f5f71a674eb6872ce507a
GitHub-Last-Rev:
869535e843d2133fa5279297b002dd96725384e0
GitHub-Pull-Request: golang/go#71798
Reviewed-on: https://go-review.googlesource.com/c/go/+/650195
Auto-Submit: Sean Liao <sean@liao.dev>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>