Revert "plugin pgSMB: switch loginscript from RunOnce to Run"

This reverts commit de2fdb512853c39d3ba6eb2650a217db47ffcb30.
plugin pgSMB: run the loginscript as user instead of using Regkey Run

https://github.com/MutonUfoAI/pgina/issues/3
https://github.com/MutonUfoAI/pgina/issues/4