Problem/Motivation
The scope of #3463142: Allow modules to hook into top of content section of new core navigation has narrowed to focus on the top section of content, but I still feel modules(particularly ones around users[Masquerade], help, etc) would benefit from being able to hook into the footer section of navigation.
Per the previous issue:
A potential follow-up issue could look at adding the same kind of extensibility to the footer region. The footer region is more sensitive from a design perspective to a big number of blocks that content region. Hence it needs further discusssion and is out of scope for this issue.
Proposed resolution
Add the ability for module developers to add integrations to a new footer_top region that sits above the footer region.
Provide hooks to easily extend the footer_top region.
Remaining tasks
User interface changes
Output footer_top variable/slot in the template.
Introduced terminology
API changes
New hook navigation_footer_top to define content_top blocks
New hook navigation_footer_top_alter to alter content_top blocks