vim-patch:7.4.1676 #5143

Problem:    The shellmenu plugin has to be copied or sourced to be used.
Solution:   Turn it into a package.

fead3ac9a3

Justification for changes that do not carry over

- `Filelist` does not exist in neovim
- neovim does not have a `README.txt` in `runtime/macros`

src/nvim/version.c

@@ -601,7 +601,7 @@ static int included_patches[] = {
   // 1679,
   // 1678 NA
   // 1677 NA
-  // 1676,
+  1676,
   1675,
   // 1674 NA
   // 1673,