Merge branch 'filter-refs'
* filter-refs:
Add links to the new refs page from summary page
Add support for refs view
Make cgit_print_branches()/cgit_print_tags() external
Add descriptions of summary-branches and summary-tags to cgitrc
Add support for config param summary-branches
Move logic for age comparision from cmp_tag_age into cmp_age()
Add support for config param summary-tags
Sort tags by age
Use reflist to print tag info
Use reflist to print branch info
Add functions and types for ref lists