Tru64 UNIX SIA in 2.5.2p1 is hosed

[Steve VanDevender]

Something really hosed Digital/Tru64 UNIX SIA support in 2.5.2p1.  I
haven't been able to figure out what changed in the code, but the
symptom seems to be that the TTY name being registered with SIA is
truncated to eight characters.  This apparently prevents it from
matching with entries in the tty database, and the dreaded "Cannot
obtain database information on this terminal message" is printed after
authentication completes and the session terminates immediately.  The
2.5.1p2 sshd works fine on my Digital UNIX system.