[fix] GDB port fixed to 4242 until better command line parsing. leave DFU mode.
[fix] GDB port fixed to 4242 until better command line parsing. leave DFU mode.

gtalusan/stlink,fedorcomander/stlink,ros2/stlink,gtalusan/stlink,12019/stlink,ros2/stlink,simonjwright/stlink,simonjwright/stlink,12019/stlink,swegener/stlink,fedorcomander/stlink,braincorp/stlink,karlp/kkstm32_base,trigrass2/stlink,trigrass2/stlink,swegener/stlink,chaosAD/stlink,chaosAD/stlink,braincorp/stlink