security problems.
Also re-do the method we use for disconnecting ourselves from the supplied
gmp and z libraries so that this can be maintained in the future (sigh!).
patch-ac: call setsid() before setlogin() in the child (when emulating rsh)
otherwise the setlogin() will fail when/if the proposed setlogin() changes
go in. Otherwise it silently fails and may leave the login name of the user
session as "root" (depending on how sshd was started). Without the proposed
kernel change, it harmlessly sets the login name of the user's session.
patch-ad: patch the #ifdef botch that stopped a ssh login from using and
updating the lastlog file. This is because we have struct lastlog defined
inside utmp.h rather than a lastlog.h include file like it was expecting.
