Use curl to download for InstallDU

README.md

src/Makefile

src/swmod.c

src/swmod_lxc.c

src/swmod_lxc.h

src/swmod_opkg.c

src/swmod_opkg.h

src/swmod_uci.c

src/swmod_uci.h

src/tools.c

src/tools.h