Allow setting custom meta tags for secondary pages

[Naatan]

Use-case: I have a paged page on my site which has a higher than default priority on the sitemap.xml. Subsequent pages of this page should not retain thigh high priority and should instead use the default value.

[StormPooper]

This makes sense, but it should probably be something that is configurable - some people won't want their paginated pages to show up at all, whereas others might want them at a lower priority than the default. I'll see if I can add something like this to either the paged or sitemap plugin.