A nice default vimrc for new users.

Otherwise users get "vi compat mode" which gives very old and
unfriendly vi defaults that breaks arrow keys and backspace as well
as no color.

Expert users can disable this default vimrc via "make config".

Approved by: delphij


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372622 35697150-7ecd-e111-bb59-0022644237b5