Update chat.md

Update bbcode.md

Update language.md

Update triggers.md

Update rest-api.md

Improvment

New instruction on how stop a bad referral traffic from an unauthorized domain.

Update install.md

try to fix link

Fix link

Fix

Updating minimum PHP to 8.0
Adding information about widget multi-domain

typing fix

fix

adding new info for avoid tracking visitor issues

Update conf for nigix

Adding instruction on how allow code to multi domain and subdomain.

Need a different htaccess...

Update install.md

Update how-to-use-bot.md

Update collect-custom-attribute.md