BUG#19209 "Test 'rpl_openssl' hangs on Windows"

 Enabling rpl_openssl.test for Windows to check that
 currently it still hangs (because I can't reproduce
 this on my machine).

mysql-test/t/rpl_openssl.test

 # TODO: THIS TEST DOES NOT WORK ON WINDOWS
 #       This should be fixed.
---source include/not_windows.inc
+#--source include/not_windows.inc
 
 source include/have_openssl.inc;
 source include/master-slave.inc;