Detection of existing URLs doesn't work reliably with redirected URLs

[marcelklehr]

Steps to reproduce

1. Add URL beta.speedtest.net via ui
2. Add URL speedtest.net

Expected behaviour

# 1 creates a bookmark for www.speedtest.net
# 2 doesn't create a new bookmark as it's also redirected to www.speedtest.net

Actual behaviour

After the two steps there are two bookmarks for the same URL www.speedtest.net

Server configuration

Web server: Apache

Database: Confirmed for SQLite and MySQL

PHP version:

Nextcloud version: (see Nextcloud admin page)

Bookmarks version: 0.11 as well as latest master