net/http: rename server receiver for consistency
"receiver name `srv` should be consistent with the previous receiver name
`s` for Server" according to go-lint.
Change-Id: I3071ae30b7c1375999e5a599a0eee7b88494f17e
GitHub-Last-Rev:
093c7679b1919f364ed542904203d22ed2048313
GitHub-Pull-Request: golang/go#65787
Reviewed-on: https://go-review.googlesource.com/c/go/+/565175
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>