fix Config class references
add new `/links-to/{domain}` route for showing all posts that link to specific domain names
better view of collections in a list, just looks like an article for now.
static function
add Site::getAllDomains() function
allow hyphens in @ autolinker
rough draft of map URLs (still needs paging support)
don't actually reject webmentions from unapproved domains without a vouch right now. Instead, accept all webmentions that don't have a vouch as normal. If a vouch is present, process using the vouch extension as normal.
track referers in a new database table
record vouch URL in webmention data for a page
display "vouched for by" domain if a webmention has a vouch
show vouch URL on likes and reposts as a title attribute
add soft fail message for un-approved webmentions with no vouch
vouch