Revision 1865449

Avoid use of FINFO_NORM where possible; if not possible then switch off the FINFO_PROT bits on Windows

Some Windows set-ups have problems using apr_stat()'s FINFO_NORM mode: see https://bz.apache.org/bugzilla/show_bug.cgi?id=51560 and the dev@apr.apache.org thread cited in Comment 4 on that bug.

The problem revolves around the information requested by the APR_FINFO_GPROT and APR_FINFO_WPROT bits. We don't appear to need that information in what we're doing, so the simplest workaround is to turn off those bits (and the APR_FINFO_UPROT bit) in what we're requesting -- but only on WIN32, to minimize regression risk.

In some places we clearly only need a tiny subset of what FINFO_NORM gives us anyway, and switching to FINFO_MIN etc instead is even easier (and hopefully risk-free).