Note about failing Windows integration tests and idp.home

[Rod Widdowson]

> So, while we throw an error if idp.home ends with a /, I think we might
should
> bail out also if idp.home contains \.

I'm usually pretty much against that sort of stuff.  Just because 40 years
ago someone chose a new directory separator why do we have to pretend that
every operating system uses it?  But you can only push so far and as you
point out the restriction is really imposed by Spring  using the wrong
type...  So I'd say "let's do that and fix it in the documentation".

Tom, I barely dare say this, but for completely you need to know that some
Windows paths can start with a double slash ("\\localhost\c$\dir\file" or
"\\.\GlobalRoot\Device\HarddiskVolumeShadowCopy7\path\to\readonly\file").  I
would state forcefully that we just do not want to go there,

Rod