Add internal filesystem module comment;
@@ -63,6 +63,7 @@ static struct {
bool fused;
} state;
+// Rejects any path component that would escape the virtual filesystem (./, ../, :, and \)
static bool valid(const char* path) {
if (path[0] == '.' && (path[1] == '\0' || path[1] == '.')) {
return false;
