When for example on /hudson/configure the executables sh or cvs can't be located
the error message might cause a horizontal scrollbar to appear in the browser if
the PATH is rather long. This is rather annoying if you then open an elaborate
help text which requires a lot of scrolling left and right.

This patch makes use of the tokenized diretories to create a ', ' separate list
to allow the browser to wrap the line easier.

When I tested this patch I noticed that the QuotedStringTokenizer mangled my
windows directory paths. C:\WINDOWS\system32 came out as C:WINDOWSsystem32.
Which explained why it couldn't locate cvs even when it is on the path. I
patched this also in the FormFieldValidator by replace \ with
just before the
PATH is tokenized. This does the trick. But the question remains if this
problem occurs in other situations?