Make some improvements to "golang" search configuration:
- Copy and modify the default configuration, instead of building one
up from scratch.
- Create a simple dictionary that also ignores English stop words,
and use it for ASCII words and words with numbers.
- Drop the url_path mapping, so we index only full URLs, not paths.
Change-Id: Ia648796964647cbeb8143117b7eecd1f23a2d35d
Reviewed-on: https://team-review.git.corp.google.com/c/golang/discovery/+/703119
Reviewed-by: Julie Qiu <julieqiu@google.com>
Jonathan Amsterdam