According to commit log libpng12 section was not needed, but was refered here.

Conflicts:
	software/erp5/software.cfg
	stack/erp5.cfg

If a domain_name is provided it means the setup will be used with
as a valid front end. This permits use ERP5 on slapos without an
additional frontend provider.

Provides a URL that direct access the wanted resource based
on arguments provided.

Curl component was modified because of url not working. Changing it back
to original url.
This reverts commit 4cae8f81.