freeaddrinfo(3) change

[itojun%iijlab.net@localhost]

>Module Name:   basesrc
>Committed By:  itojun
>Date:          Thu Jan 27 08:25:51 UTC 2000
>
>Modified Files:
>       basesrc/lib/libc/net: getaddrinfo.c
>
>Log Message:
>allow freeaddrinfo(NULL).  nothing is talked in RFC2553 (maybe in X/Open?).
>however, since NRL freeaddrinfo permits it, we need to.

        I'll try to get more clarificaiton, and may backout the change
        afterwards.  At this moment www.xopen.org is unreachable from me.

itojun