syntax: List NeoVim-specific autocmd events

Note: list was copied from master (7a6bf3f418). 
I did not add more events there.

scripts/genvimvim.lua

@@ -80,17 +80,31 @@ local vimau_start = 'syn keyword vimAutoEvent contained '
 w('\n\n' .. vimau_start)
 
 for _, au in ipairs(auevents.events) do
+  if not auevents.neovim_specific[au] then
     if lld.line_length > 850 then
       w('\n' .. vimau_start)
     end
     w(' ' .. au)
   end
+end
 for au, _ in pairs(auevents.aliases) do
+  if not auevents.neovim_specific[au] then
     if lld.line_length > 850 then
       w('\n' .. vimau_start)
     end
     w(' ' .. au)
   end
+end
+
+local nvimau_start = 'syn keyword nvimAutoEvent contained '
+w('\n\n' .. nvimau_start)
+
+for au, _ in pairs(auevents.neovim_specific) do
+  if lld.line_length > 850 then
+    w('\n' .. nvimau_start)
+  end
+  w(' ' .. au)
+end
 
 w('\n\nsyn case match')
 local vimfun_start = 'syn keyword vimFuncName contained '

src/nvim/auevents.lua

@@ -94,5 +94,13 @@ return {
     BufRead = 'BufReadPost',
     BufWrite = 'BufWritePre',
     FileEncoding = 'EncodingChanged',
-  }
+  },
+  -- List of neovim-specific events or aliases for the purpose of generating 
+  -- syntax file
+  neovim_specific = {
+    TabNew=true,
+    TabNewEntered=true,
+    TabClosed=true,
+    TermEnter=true,
+  },
 }