For anyone out there who wants to debug this module, you'll need Visual Studio
6 and the Microsoft Platform SDK installed. The command-line utilities (eg.
cl, link, rc, nmake, etc) need to be in the path when you issue the commands
below. 

As of 0.9.0, the Visual Studio workspace and project have gone. In their place
is a new Makefile that accepts a parameter "DEBUG". To build a regular
distribution, do

    C:\Src\mod_auth_sspi>nmake dist

and the interesting stuff will be put in the "bin" directory. To make a binary
that you can debug, do

    C:\Src\mod_auth_sspi>nmake DEBUG=1 dist

and then either copy bin/* into apache2/modules, or change your httpd.conf to
explicitly load the copy of the module located in the bin directory. 

To run Apache and debug mod_auth_sspi, I suggest running it from the
command-line like so

    C:\Apache2\bin>apache -DONE_PROCESS

The module will attach a debugger the first time a request that requires SSPI
authentication is received. Note that this doesn't allow easy debugging of the
module's initialisation code, but you should be able to insert DebugBreak()
calls where you want them and rebuild. 

Once the debugger has attached, you can set breakpoints and inspect variables
as per usual. Note that the initial breakpoint that was hit when the debugger
attached won't be hit a second time. 

