We have x/net in here purely for the fetch_ech_config_list.go script,
but Go is not very good at handling single-file scripts. The
conventional workaround seems to make a dummy package which imports the
needed packages.
Change-Id: I16c09ce5c8359c66cb86d6f07636ea41bbb49ead
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/69727
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: Bob Beck <bbe@google.com>
Reviewed-by: Bob Beck <bbe@google.com>