Some proxy protocols expect to be passed a hostname, which they
will resolve to an IP address themselves. Others, like SOCKS4, do
not allow this. This function will return false if proxy is
implementing such a protocol. When false is returned, the caller
should resolve the destination hostname first, and then pass a
#GProxyAddress containing the stringified IP address to
gio.proxy.Proxy.connect or gio.proxy.Proxy.connectAsync.
Some proxy protocols expect to be passed a hostname, which they will resolve to an IP address themselves. Others, like SOCKS4, do not allow this. This function will return false if proxy is implementing such a protocol. When false is returned, the caller should resolve the destination hostname first, and then pass a #GProxyAddress containing the stringified IP address to gio.proxy.Proxy.connect or gio.proxy.Proxy.connectAsync.