ProxyPeerAddressHandler incorrectly parses X_FORWARDED_FOR headers

The X_FORWARDED_FOR header is incorrectly parsed when there are multiple chained adresses like this:

X_FORWARDED_FOR : 85.10.10.17, 10.162.219.114

 See [documentation|https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For]

Instead of matching the whole header as IPv4/IPv6, the first ('mostRecent') address should be matched

The current code is this:

String remoteClient = mostRecent(forwardedFor);
//we have no way of knowing the port
if(IP4_EXACT.matcher(forwardedFor).matches())
Unknown macro: { exchange.setSourceAddress(new InetSocketAddress(NetworkUtils.parseIpv4Address(remoteClient), 0)); }
else if(IP6_EXACT.matcher(forwardedFor).matches()) {
exchange.setSourceAddress(new InetSocketAddress(NetworkUtils.parseIpv6Address(remoteClient), 0));

I would expect this:

String remoteClient = mostRecent(forwardedFor);
//we have no way of knowing the port
if(IP4_EXACT.matcher(remoteClient).matches())
Unknown macro: { exchange.setSourceAddress(new InetSocketAddress(NetworkUtils.parseIpv4Address(remoteClient), 0)); }
else if(IP6_EXACT.matcher(remoteClient).matches()) {
exchange.setSourceAddress(new InetSocketAddress(NetworkUtils.parseIpv6Address(remoteClient), 0));