RT-Thread/rt-thread: KM https://github.com/RT-Thread/rt-thread.git @ copilot/remove-vbus-code-implementation

kopia lustrzana https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

Troy 3a4db99104 [libc][posix/io] add comments		2 lat temu
..
sys	3a4db99104 [libc][posix/io] add comments	2 lat temu
SConscript	15435b6850 [posix][mmap] create the mman folder	4 lat temu
mman.c	3a4db99104 [libc][posix/io] add comments	2 lat temu