OpenOCD not working under System Workbench
Now i can not test whether it works or not, because i've overwritten the default SW openocd. But i use my board (blue pill) now without HW reset pin (i'm using it with sw reset) and it works. I still believe that openocd was using wrong config for stlink and was unable to even connect to it, not board (imho). Whatever, now everything is setup and i'm learning the stm32 and using SW and i'm happy!