Created attachment 34135 [details]
Add log message when dav_auto_checkin fails

Function dav_auto_checkin may fail. The majority of calls have checked the return value and printed log message like the following code snippet, while the others have not. Those unchecked ones probably need logs too (see attachment).

/* httpd-2.4.10/modules/dav/main/mod_dav.c:3421:11 */
    err = dav_auto_checkin(r, resource, 0 /*undo*/, 0 /*unlock*/, &av_info);
    if (err != NULL) {
        /* just log a warning */
        err = dav_push_error(r->pool, err->status, 0,
                             "The VERSION-CONTROL was successful, but there "
                             "was a problem automatically checking in "
                             "the parent collection.",
                             err);
        dav_log_err(r, err, APLOG_WARNING);
    }