Regression fix:

select/poll calls will only be retried upon EINTR failures as
it previously was in lib/select.c revision 1.29

In this way Curl_socket_ready() and Curl_poll() will again fail
on any select/poll errors different than EINTR.

RELEASE-NOTES

@@ -34,6 +34,7 @@ This release includes the following bugfixes:
  o crash when connection cache size is 1 and Curl_do() failed
  o GnuTLS-built libcurl can now be forced to prefer SSLv3
  o crash when doing Negotiate again on a re-used connection
+ o select/poll regression
 
 This release includes the following known bugs: