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

libc/runtime/runtime.h

@@ -104,6 +104,7 @@ long GetMaxFd(void);
 char *GetProgramExecutableName(void);
 char *GetInterpreterExecutableName(char *, size_t);
 void __printargs(const char *);
+void __paginate(int, const char *);
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */