moved XLFLAGS to the .opt file so that external libs can be added;

added new var XDCDATA and removed xdcdata setting from mis-used XLFLAGS;
moved some copyright from .opt to .def file since -copy option doesnt accept commas.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@531666 13f79535-47bb-0310-9956-ffa450edef68