VIM LICENSE

I)  There are no restrictions on distributing unmodified copies of Vim
except that they must include this license text. You can also distribute
unmodified parts of Vim, likewise unrestricted except that they must
include this license text. You are also allowed to include executables that
you made from the unmodified Vim sources, plus your own usage examples and
Vim scripts.

II)  It is allowed to distribute a modified (or extended) version of Vim,
including executables and/or source code, when the following four
conditions are met:

1)  This license text must be included unmodified.

2)  The modified Vim must be distributed in one of the following five ways:

a)  If you make changes to Vim yourself, you must clearly describe in the
distribution how to contact you. When the maintainer asks you (in any way)
for a copy of the modified Vim you distributed, you must make your changes,
including source code, available to the maintainer without fee. The
maintainer reserves the right to include your changes in the official
version of Vim. What the maintainer will do with your changes and under
what license they will be distributed is negotiable. If there has been no
negotiation then this license, or a later version, also applies to your
changes. The current maintainer is Bram Moolenaar <Bram@vim.org>. If this
changes it will be announced in appropriate places (most likely vim.sf.net,
www.vim.org and/or comp.editors). When it is completely impossible to
contact the maintainer, the obligation to send him your changes ceases.
Once the maintainer has confirmed that he has received your changes they
will not have to be sent again.

b)  If you have received a modified Vim that was distributed as mentioned
under a) you are allowed to further distribute it unmodified, as mentioned
at I). If you make additional changes the text under a) applies to those
changes.

c)  Provide all the changes, including source code, with every copy of the
modified Vim you distribute. This may be done in the form of a context
diff. You can choose what license to use for new code you add. The changes
and their license must not restrict others from making their own changes to
the official version of Vim.

d)  When you have a modified Vim which includes changes as mentioned under
c), you can distribute it without the source code for the changes if the
following three conditions are met:

-  The license that applies to the changes permits you to distribute the
changes to the Vim maintainer without fee or restriction, and permits the
Vim maintainer to include the changes in the official version of Vim
without fee or restriction.

-  You keep the changes for at least three years after last distributing
the corresponding modified Vim. When the maintainer or someone who you
distributed the modified Vim to asks you (in any way) for the changes
within this period, you must make them available to him.

-  You clearly describe in the distribution how to contact you. This
contact information must remain valid for at least three years after last
distributing the corresponding modified Vim, or as long as possible.

e)  When the GNU General Public License (GPL) applies to the changes, you
can distribute the modified Vim under the GNU GPL version 2 or any later
version.

3)  A message must be added, at least in the output of the ":version"
command and in the intro screen, such that the user of the modified Vim is
able to see that it was modified. When distributing as mentioned under 2)e)
adding the message is only required for as far as this does not conflict
with the license used for the changes.

4)  The contact information as required under 2)a) and 2)d) must not be
removed or changed, except that the person himself can make corrections.

III)  If you distribute a modified version of Vim, you are encouraged to
use the Vim license for your changes and make them available to the
maintainer, including the source code. The preferred way to do this is by
e-mail or by uploading the files to a server and e-mailing the URL. If the
number of changes is small (e.g., a modified Makefile) e-mailing a context
diff will do. The e-mail address to be used is <maintainer@vim.org>

IV)  It is not allowed to remove this license from the distribution of the
Vim sources, parts of it or from a modified version. You may use this
license for previous Vim releases instead of the license that they came
with, at your option.


