bin/76089: The "-n" option in /usr/bin/w is broken

[Sergey Matveychuk]

w(1) behaviour has changed with brien commit in w.c revision 1.48.

Funny, but looks like '-n' options works right after commit, not before.

The reason is utmp holds a host name and w(1) with '-n' flag _do_ 
resolve hostname back in IP address and without '-n' don't resolve it.
It's confised.

IMHO to be more robust, we should make utmp to hold an IP address 
instead of a hostname and change all applications that use it. As bonus 
it will fix a delay on login when resolving does not work. And last(1) 
will show more useful IP address instead of changable hostname.

But I'm not sure about standards.

-- 
Sem.