The useragent filter creates new field names in elasticsearch like "name", "major version", "minor version". Name is the browser name. Major version is the browser major version. Minor is the browser minor version.
I want to create a new field named "browser" that is a combination (conctenation) of the field values from name, major version, and minor version.
My new "browser" field might have a value of "Internet Explorer 10.0", or "Google Chrome XX.X" or "Firefox XX.X"
What filter do I need to write in my logstash.conf to create the new "browser" field and populate the "browser" field with the concatenated value?