Make improvements

- Expand redbean UNIX module
- Expand redbean documentation
- Ensure Lua copyright is embedded in binary
- Increase the PATH_MAX limit especially on NT
- Use column major sorting for linenoise completions
- Fix some suboptimalities in redbean's new UNIX API
- Figured out right flags for Multics newline in raw mode

examples/time.c

@@ -67,9 +67,9 @@ int main(int argc, char *argv[]) {
   char *exepath;
   struct rusage r;
   long double real;
-  char exebuf[PATH_MAX];
+  char exebuf[PATH_MAX + 1];
   if (argc >= 2) {
-    if ((exepath = commandv(argv[1], exebuf))) {
+    if ((exepath = commandv(argv[1], exebuf, sizeof(exebuf)))) {
       real = nowl();
       argv[1] = exepath;
       if ((ws = xvspawn(OnChild, argv + 1, &r)) != -1) {