Remove the README section on using a public flashproxy-client.
Remove the README section on using a public flashproxy-client.

This is less necessary than it was in the early days, when no one wanted
to bother to download the client software. I probably won't run a public
flashproxy-client on the next facilitator I set up.

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