Ticket #48822 - (389-ds-base-1.3.5) Fixing coverity issues.
    
    Description: RETURN_LOCAL -- slapd/util.c:232: return_local_addr_
    identity: Returning result of calling "do_escape_string".
    
    A buffer used for the escape needed to be prepared by the caller of
    escape_string_for_filename since the return value is the pointer to
    the buffer.
    
    https://fedorahosted.org/389/ticket/48822
    
    Reviewed by wibrown@redhat.com (Thank you, William!!)