last_session
c->last_session = c->session;
c->last_session = c->session;
if (tc->last_session != NULL && session_alive(tc->last_session))
s = tc->last_session;
ft->c->last_session != NULL &&
session_alive(ft->c->last_session))
return (xstrdup(ft->c->last_session->name));
c->last_session = c->session;
c->last_session = NULL;
c->last_session = NULL;