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

third_party/lua/lualib.h

@@ -1,12 +1,5 @@
-/*
-** $Id: lualib.h $
-** Lua standard libraries
-** See Copyright Notice in lua.h
-*/
-
 #ifndef lualib_h
 #define lualib_h
-
 #include "third_party/lua/lua.h"
 
 /* clang-format off */