XF 1.5 .htaccess slight url change

[Shipside]

Some very old imported threads link to a nonworking url string for threads.

domain.com/forum/

now

domain.com (no /forum/ subdirectory as the forum is now in root)

What should I add to .htaccess to amend this?

RewriteCond %{HTTP_HOST} domain.com/forum/$
RewriteRule ^(.*)$ http://domain.com$1 [R=301,L]

Is this incorrect?

 

[Mike]

RewriteRule ^forum/(.*)?$ /$1 [R=301,L]

 

[Shipside]

Thank you

 

[Shipside]

Can this be made with mandatory https?

 

[Mike]

See question 20: https://xenforo.com/community/threads/frequently-asked-questions.5183/post-180456