Use specified HTTP proxy. If the port number is not specified, it is assumed
at port 1080.
+This option overrides existing environment variables that sets proxy to
+use. If there's an environment variable setting a proxy, you can set proxy to
+"" to override it.
+
\fBNote\fP that all operations that are performed over a HTTP proxy will
transparantly be converted to HTTP. It means that certain protocol specific
operations might not be available. This is not the case if you can tunnel