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/close.c

@@ -73,7 +73,9 @@ int close(int fd) {
         }
       }
     }
-    if (!__vforked) __releasefd(fd);
+    if (!__vforked) {
+      __releasefd(fd);
+    }
   }
   STRACE("%s(%d) → %d% m", "close", fd, rc);
   return rc;