Only SNI browsers redirect to https

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

# if browser supports SNI set SERVER variable
SetEnv SSL_TLS_SNI %{SSL:SSL_TLS_SNI}

# if it's browser that supports SNI then redirect to https
RewriteCond %{HTTPS} off
RewriteCond %{HTTP_USER_AGENT} !MSIE\s[1-8]\. [NC]
RewriteCond %{HTTP_USER_AGENT} !Windows\sNT\s5\. [NC]
RewriteCond %{HTTP_USER_AGENT} !Opera/[1-3]\. [NC]
RewriteCond %{HTTP_USER_AGENT} !Safari/[1-4]\. [NC]
RewriteCond %{HTTP_USER_AGENT} !Navigator/ [NC]
RewriteCond %{HTTP_USER_AGENT} !Android.*(Mobile)?\s[0-3]\. [NC]
RewriteCond %{HTTP_USER_AGENT} !^(.*.symbian.*) [NC]
RewriteCond %{HTTP_USER_AGENT} !^(.*.blackberry.*) [NC]
RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

# if path doesn't contains www append it for both http and https
RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule .* https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule .* http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

</IfModule>