Adds version status to limit issue assignments (#1245).

Available version statuses are:
* open: no restriction
* locked: can not assign new issues to the version
* closed: can not assign new issues and can not reopen assigned issues

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3020 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/versions/_form.rhtml

@@ -3,6 +3,7 @@
 <div class="box">
 <p><%= f.text_field :name, :size => 60, :required => true %></p>
 <p><%= f.text_field :description, :size => 60 %></p>
+<p><%= f.select :status, Version::VERSION_STATUSES.collect {|s| [l("version_status_#{s}"), s]} %></p>
 <p><%= f.text_field :wiki_page_title, :label => :label_wiki_page, :size => 60, :disabled => @project.wiki.nil? %></p>
 <p><%= f.text_field :effective_date, :size => 10 %><%= calendar_for('version_effective_date') %></p>
 </div>