DEVEL15-xdr-free-20090401

DEVEL15-xdr-free-20090401

LICENSE MIT

add xdr_free() and export it from afsrpc.dll.  This permits applications
to free memory allocated within the xdr routines with the same run time
library memory management routines as was used to allocate it.

This is necessary on Windows to prevent memory corruption.

VL_GetAddrsU() is an example where a xdr array is allocated in the
library and must be freed by the application.

(cherry picked from commit d7749751df230d919188546106b61bd2dbb8974c)