Correct transaction management. cf. bug https://openrdf.atlassian.net/browse/SES-2295 and tomcat default management of PUT request with form data (application/x-www-form-urlencoded encoded)
<IfModule alias_module>
Alias /icons/ "<%= @icons_path %>/"
<Directory "<%= @icons_path %>">
Options <%= @icons_options %>
AllowOverride None
<%- if scope.function_versioncmp([@apache_version, '2.4']) >= 0 -%>
Require all granted
<%- else -%>
Order allow,deny
Allow from all
<%- end -%>
</Directory>
</IfModule>