#It is unclear if url_stat handlers should emit a warning in case
#PHP_STREAM_URL_STAT_QUIET is not specified and the resource does
#not exist. Most url_stat handlers never emit messages; the plain
#one does only so in the extraordinary event of an open_basedir
#restriction.
#But in case, php_stat uses PHP_STREAM_URL_STAT_QUIET for the
#FS_EXISTS, which suggests that mere checks on file existence are
#supposed to use this flag (arguably).
#The downside is that important diagnostic messages might be
#omitted.
