incorrect value of CINIT_FLAG_DEFER_DROP_PRIVILEGES
This was causing hangs in test/rgw/test_multi.py, because radosgw is being started via the python subprocess module, which waits for radosgw to terminate or close its stderr. Even though we don't pass CINIT_FLAG_NO_CLOSE_STDERR to global_init(), it still wasn't being closed.
It turns out that CINIT_FLAG_DEFER_DROP_PRIVILEGES has a hex value that overlaps both CINIT_FLAG_NO_DEFAULT_CONFIG_FILE and CINIT_FLAG_NO_CLOSE_STDERR, causing them to be silently enabled when using civetweb.
The fix was merged to master in https://github.com/ceph/ceph/pull/8792