* ui: Fix compiler warning by making UIWindow destructor virtual
* ui: Fix some compiler warnings by commenting out unnecessary code
* smtp: Fix compiler warnings caused by implicit cast from Boolean to pointer
* http: Fix some compiler warnings by commenting out unnecessary code
* sconex/Stream: commit af6011fffe06cc736141a9d98e6239479d517594 removed the
  add_module_ref code; remove some now-vestigial code
* all: Fix compiler warnings caused by va_start() calls
* lettuce/LettuceCommandStream: Fix compile warnings (missing switch cases)