Problem:    OS/2 and MS-DOS are still mentioned, even though support was
            removed long ago.
Solution:   Update documentation. (Yegappan Lakshmanan, closes #5368)

Problem:    Defaults are very conservative.
Solution:   Move settings from vimrc_example.vim to defaults.vim.  Load
            defaults.vim if no .vimrc was found.

Problem:    Non-GUI specific settings in the gvimrc_example file.
Solution:   Move some settings to the vimrc_example file.  Remove setting
            'hlsearch' again. (suggested by Hirohito Higashi)

Problem:    The matchit plugin needs to be copied to be used.
Solution:   Put the matchit plugin in an optional package.

Problem:    Language mapping also applies to mapped characters.
Solution:   Add the 'langnoremap' option, when on 'langmap' does not apply to
            mapped characters. (Christian Brabandt)

Problem:    By default, after closing a buffer changes can't be undone.
Solution:   In the example vimrc file set 'undofile'.