Don't log client errors as FlowError (#42)
Don't log client errors as FlowError (#42)

- Ex:
   [proxy] FlowError Client Error proxy862ffef2de3349428f0fcc9b5083decc path[/language/Swedish${IFS}&&echo${IFS}610cker>qt&&tar${IFS}/string.js] status[400]: Illegal character in path at index 18: /language/Swedish${IFS}&&echo${IFS}610cker>qt&&tar${IFS}/string.js

 - Just log a a warning
flowvault/proxy,flowvault/proxy,flowvault/proxy