Update warning_post.txt

Fix WARNING_POSTER username.
Update warning_post_ban.txt
Update warning_user.txt
Update warning_user_ban.txt
Update warning_edited.txt
Update warning_ban_by_warning.txt
Merge branch 'patch-5' of https://github.com/lavigor/advanced_warnings into lavigor-patch-5
Merge branch 'lavigor-patch-5'