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/calls/execve.c

@@ -60,7 +60,7 @@ int execve(const char *prog, char *const argv[], char *const envp[]) {
         if (i) kprintf(", ");
         kprintf("%#s", envp[i]);
       }
-      kprintf("})%n");
+      kprintf("})\n");
     }
 #endif
     for (i = 3; i < g_fds.n; ++i) {