per second.

  function that deprecates the curl_multi_socket() function. Using the new
  function the application tell libcurl what action that was found in the
  socket that it passes in. This gives a significant performance boost as it
  allows libcurl to avoid a call to poll()/select() for every call to
  curl_multi_socket*().

without the curl memory debugging leak detection code enabled.

name longer than the name field of the ifreq struct (typically 6 bytes), as
then it wouldn't close the used dummy socket.

returning an error code, to allow connections to be torn down
cleanly since this function can be called AFTER an OOM situation
has already been reached.

Made libssh2 logging more verbose when debugging is enabled.

easy handles are added to a multi handle, by avoiding the looping over all
the handles to find which one to remove.

by letting configure check for setmode and ifdef on HAVE_SETMODE. NOTE: non-
configure platforms that havve setmode() needs their hard-coded config.h files
fixed. I fixed the src/config-win32.h.

and they have to be non-NULL long before this check.
CID 22 in the coverity.com scan