C++ Debugging Support library

Unlike the previous release, this release really adds support for Red
Hat 9 and threading. The handling of Thread Specific Data has been
rewritten to function with the NPTL (Native POSIX Threads Library), as
opposed to the older LinuxThreads. A few minor bugfixes have been
made, as well.

This release works with glibc-2.3.2. Several minor thread related bug fixes have been made. One major bug was fixed: memory allocated after a call to list_allocations_on() was not synchronized with the the current ooam_filter_ct, and therefore could be randomly filtered by subsequent calls to list_allocations_on().

This release make all allocations that are the result of a Dout
non-"internal". g++ 3.x is now required, and support for g++ 3.3 has
been added. Threading under glibc-2.3 is still not supported. The
headerfiles have been moved to another directory, and some have been
renamed. A few minor threads-related bugfixes have been made.

The most important changes in this release are that new/delete with std::nothrow_t were added, so that libcwd works with, for example, gtkmm-2.x. The demangler was fixed to reflect the changes in mangling introduced in g++ 3.1. The DWARF-2 line number lookup has been improved and should now return the correct source-file:line-number in all cases (with g++ 3.2).