Axe some warnings in rotatelogs which came when the program was

converted to use APR.  The behaviors of apr_file_read() and
apr_file_write() weren't taken completely into account.

But note: In a couple of places the check "nRead < 0" was removed.
          While that is meaningless with APR and hasn't done anything
          useful in a long time, in Apache 1.3 days it was essentially
          a check for read-failed-with-EINTR.  Apparently a rotation
          would occur if the read was interrupted by a signal.  That
          function has been lost with the APR-ization.

PR:              12617


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97570 13f79535-47bb-0310-9956-ffa450edef68