ITS#3712 skip Winsock detection on Cygwin

configure

 #! /bin/sh
 # $OpenLDAP$
-# from OpenLDAP: pkg/ldap/configure.in,v 1.578 2005/05/05 20:57:25 hyc Exp  
+# from OpenLDAP: pkg/ldap/configure.in,v 1.579 2005/05/05 22:39:26 hyc Exp  
 # This work is part of OpenLDAP Software <http://www.openldap.org/>.
 #
@@ -8976,7 +8976,7 @@ fi
 fi
-if test "$ac_cv_header_winsock_h" = yes; then
+if test "$ac_cv_cygwin" != yes && "$ac_cv_header_winsock_h" = yes; then
 echo $ac_n "checking for winsock""... $ac_c" 1>&6
 echo "configure:8982: checking for winsock" >&5
 if eval "test \"\${ol_cv_winsock+set}\" = set"; then

configure.in

@@ -834,7 +834,9 @@ fi
 dnl The following is INTENTIONALLY scripted out because shell does not
 dnl support variable names with the '@' character, which is what
 dnl autoconf would try to generate if one merely used AC_SEARCH_LIBS
-if test "$ac_cv_header_winsock_h" = yes; then
+dnl
+dnl Skip Winsock tests on Cygwin
+if test "$ac_cv_cygwin" != yes && "$ac_cv_header_winsock_h" = yes; then
 AC_CACHE_CHECK([for winsock], [ol_cv_winsock],
 save_LIBS="$LIBS"
 for curlib in ws2_32 wsock32; do