20cad57cd4
The POSIX __linux__ commit broke the special detection on linux used to determine whether a secure system was in use or not. This commit reworks the logic a little bit to avoid special casing linux in main(). It also reworks the logic in CanReAuthenticate() to fix up some issues "fixed" to correct converity warnings. The logic in this case was mostly ok, but still didn't account for the proper usage of this function. Error detection improved somewhat as a result.