Allow configuration option to include admin pages in negotiation

Hello James, thanks for the proposed changes. I was holding back on this because I haven't looked into the effects to the dynamic page cache. The concern is that we produce significantly more cache variations because of the country prefix. Do you have thoughts on that?

Hi Simon. A random assortment of thoughts:

My overall feeling is LCN is a fairly low-level module and working with the Dynamic Page Cache typically requires advanced tuning of configuration, customisations etc. It's an advanced use case and it's not clear to me what more LCN could do to support it.

Could add something to the Project Page/README about it though.

@jamsilver Thank you very much for the detailed comments.