Name 404 as 404 in newrelic

This will avoid that all custom non-existing URL's will have their URL as transaction name in New Relic. All 404 pages look the same and the same code is executed, so I prefer naming them all 404 and avoiding this error: "Your application has more web transactions than we can usefully display (showing 2250 out of 2279). Some data on this page will not be accurate. "