swrap: Do not log if we are over the limit in find_socket_info_index()

swrap: Do not log if we are over the limit in find_socket_info_index()

There are applications which do:

    for (fd = 0; fd <= getdtablesize(); fd++) {
        close(fd)
    };

This produced millions of error messsages.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>