Fix UDP and TCP port byte order in saved options.

Fix UDP and TCP port byte order in saved options.

The UDP and TCP port are stored in network byte order in the
ares_channeldata, but are passed in to ares_init_options() in host byte
order.  Thus we must return them from ares_save_options() in host byte
order too, or a duplicated channel will convert them again, leading to a
nonfunctional channel and a mysterious connection refused error from
ares_gethostbyname().  This breaks ares_dup(), thus the curl easy API
when c-ares is used by curl, and thus all the curl easy API's users.