.htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

# Redirect to HTTPS
RewriteCond %{http:X-FORWARDED-PROTO} !https
RewriteCond %{HTTP_HOST} ^2019\.nejsconf\.com$ [NC]
RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R,L]
# End

RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{REQUEST_FILENAME}.zgz -f 
RewriteRule ^(.*)$ $1.zgz [L]

<FilesMatch "zgz$">
    Header set Content-Encoding gzip
</FilesMatch>

RedirectMatch 301 ^/cfp$ https://www.papercall.io/nejsconf-2019
RedirectMatch 301 ^/cfp/$ https://www.papercall.io/nejsconf-2019

RedirectMatch 301 ^/2015/(.*)$ https://2015.nejsconf.com/2015/$1
RedirectMatch 301 ^/2016/(.*)$ https://2016.nejsconf.com/2016/$1
RedirectMatch 301 ^/2017/(.*)$ https://2017.nejsconf.com/2017/$1
RedirectMatch 301 ^/2018/(.*)$ https://2018.nejsconf.com/2018/$1

RedirectMatch 301 ^/code-of-conduct/?$ https://2019.nejsconf.com/coc/
</IfModule>