server create for neovim

nvim-server.vim

if has('nvim')
  if has('win32')
    let my_server = '\\.\pipe\nvim-pipe-1234' 
  else
    let my_server = 'nvim.sock'
  endif

  let i = index(serverlist(), my_server)
  if (i < 0) 
    try
      call serverstart(my_server)
    catch 
      let my_server_started = 0
    finally
      if !exists('my_server_started')
        let my_server_started = 1
      endif
    endtry
  endif

  if exists('my_server_started') && (my_server_started == 1)
    while (v:servername != my_server)
      call serverstop(v:servername)
    endwhile
  endif
endif