Sockstat Output

[Robert Simmons]

There are a few lines in the output of sockstat related to sshd and
pflogd that all have ??:
admin1   sshd       942   4  stream -> ??
root     sshd       939   5  stream -> ??
_pflogd  pflogd     552   5  stream -> ??
root     pflogd     548   4  stream -> ??

Are these normal? Why the ??