[pca] PCA Proxy Setup

[Timothy Hosfelt]

Small issue – my clients are communicating with the proxy cache server, but the 
cache server is behind a firewall and I’m unable to successfully make an 
outgoing call through the proxy as the authentication fails.  Running PCA from 
the command line with .wgetrc setup with username and password works fine, but 
I don’t see where I can set these option in the pca-proxy.conf file.  Any help 
would be appreciated.