* common/http.c (send_request, connect_server, http_open): Use a
  struct srv instead of a single srvtag so we can pass the chosen host
  and port back to the caller.
  (connect_server): Use the proper port in the HAVE_GETADDRINFO case.
* keyserver/curl-shim.c (curl_easy_perform): Use struct srv and log
  chosen host and port.
* keyserver/gpgkeys_hkp.c (main): Properly take the port given by SRV.