Some symbol renamings which were not caught by the BIG RENAMING

because they are #defines:

    bputc              -> ap_bputc
    bgetc              -> ap_bgetc
    piped_log_write_fd -> ap_piped_log_write_fd
    piped_log_read_fd  -> ap_piped_log_read_fd

Thanks to Dean for discovering them.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81047 13f79535-47bb-0310-9956-ffa450edef68