[#547] Security audit

Conflicts:

	app/helpers/calendars_helper.rb
	app/helpers/issues_helper.rb
	app/helpers/queries_helper.rb
	app/helpers/reports_helper.rb
	app/helpers/sort_helper.rb
	app/views/common/_diff.rhtml
	app/views/common/error.html.erb
	app/views/projects/show.rhtml
	app/views/reports/_details.rhtml
	app/views/reports/_simple.rhtml
	app/views/repositories/_dir_list_content.rhtml
	app/views/search/index.rhtml
	app/views/versions/_issue_counts.rhtml
	app/views/versions/index.html.erb