[ticket/12705] Break calling make_clickable with a different server_url

PHPBB3-12705
[ticket/12705] Store the regular expression matches based on server_url

PHPBB3-12705
Merge pull request #2588 from nickvergessen/ticket/12705

Ticket/12705 Fix make_clickable when called with different server_urls
Merge branch 'develop-ascraeus' into develop

# By Joas Schilling
# Via Dhruv Goel (1) and Joas Schilling (1)
* develop-ascraeus:
  [ticket/12705] Store the regular expression matches based on server_url
  [ticket/12705] Break calling make_clickable with a different server_url