lib/53851: libwrap prints "m" instead of errno

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         53851
>Category:       lib
>Synopsis:       libwrap prints "m" instead of errno
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 10 11:30:00 +0000 2019
>Originator:     Andreas Gustafsson
>Release:        NetBSD 8.0_BETA
>Organization:

>Environment:
System: NetBSD
Architecture: i386
Machine: i386
>Description:

Perusing the syslog of a network-facing server, I saw the following
warning messages:

Jan 10 05:58:43 redacted inetd[1291]: warning: can't get client address: m
Jan 10 05:58:43 redacted inetd[1291]: warning: can't get client address: m

That unhelpful "m" apparently aries in src/lib/libwrap/socket.c:

               tcpd_warn("can't get client address: %m");

because the changes in src/lib/libwrap/diag.c 1.10 cause tcpd_warn()
to no longer support the "%m" format specifier.

>How-To-Repeat:

>Fix: