enable IsolateDestAddr on the httpTunnelPort

[n8fr8]

We should enable the isolation flags, like we do for SOCKS if the user has it on in settings

HTTPTunnelPort [address:]port|auto [isolation flags]

Open this port to listen for proxy connections using the "HTTP CONNECT" protocol instead of SOCKS. Set this to 0 if you don’t want to allow "HTTP CONNECT" connections. Set the port to "auto" to have Tor pick a port for you. This directive can be specified multiple times to bind to multiple addresses/ports. If multiple entries of this option are present in your configuration file, Tor will perform stream isolation between listeners by default. See SOCKSPort for an explanation of isolation flags. (Default: 0)