suggested changes to accept normal JVM proxy parameters to the Apache HT...

suggested changes to accept normal JVM proxy parameters to the Apache HTTP connector:

This allows the applications to be run with parameters like 
JAVA_OPTS = -Dhttp.proxyHost="hardcoreproxy.com" -Dhttp.proxyPort=8080 and still work.
Otherwise this nice API hangs with a connection timeout when behind a proxy.

Please review and let me know if you think there is a better solution or if any of the code is ugly in any way :). Thanks for the API !!