Straighten up handling of --relay-file.
Straighten up handling of --relay-file.

arlolra/flashproxy,infinity0/flashproxy,arlolra/flashproxy,arlolra/flashproxy,arlolra/flashproxy,glamrock/flashproxy,glamrock/flashproxy,infinity0/flashproxy,glamrock/flashproxy,glamrock/flashproxy,infinity0/flashproxy,infinity0/flashproxy,arlolra/flashproxy,infinity0/flashproxy,glamrock/flashproxy,arlolra/flashproxy,infinity0/flashproxy,glamrock/flashproxy,arlolra/flashproxy