backport 704771 & 704883 from trunk

Windows: Always build the odbc dbd driver on windows, 
to be consistent with the apr-util default.  
DBD_LIST is still used to build additional dbd drivers.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@712514 13f79535-47bb-0310-9956-ffa450edef68