Use strlcpy and snprintf in netstat(1).

[delphij]

Summary

Expand inet6name() line buffer to NI_MAXHOST and use
strlcpy/snprintf in various places, reported by Anton Yuzhaninov
<citrin citrin ru>.

Test Plan

exercise the affected code paths

[tuexen]

I'm fine with the changes. In some places you add {} around single statements leasing to an inconsistent usage.
Please note that I'm normally in favor of code like
if (cond) {

statement;

} else {

statement;

}
but normally I try to follow how it is done elsewhere in the file... So is this intentionally?

[hrs]

Looks good to me.