the raw data in kioslaverc uses the format "$url $port", this format
isn't being read inside the KCM anymore though. instead setProxyInformation
is called with the output of KProtocolManager::proxyFor, which internally
merges the config entry to "$url:$port" already, so the space handling in
setProxyInformation was entirely superfluous and needlessly raising
complexity

saving and changing proxy settings continues to work