README: update TLS/SSL SNI blocklist to XDP

Lunatik sni filter currently does not work
for BPFire when chrome browser is used due to
clienthello > 1500 bytes, XDP TLS/SSL has
the same issue, to block domain access, it
appears XDP DNS domain blocking works more
reliable than SNI, so if there is need to block
chrome browser for some domain, use XDP DNS
domain blocking as mitigation.

see #40

Signed-off-by: Vincent Li <[email protected]>

README.md

@@ -8,7 +8,7 @@ BPFire 基于IPFire 2.x, 一个基于Linux的安全坚固、多功能、先进
 
 1. XDP DDoS protection, See XDP SYNPROXY stops 10G DDoS SYN flood [here](https://www.youtube.com/watch?v=81Hgoy-x1A4)
 2. XDP DNS domain blocklist, ratelimit protection
-3. Lunatik LuaXDP SSL/TLS server name indication (SNI) blocklist, see [Lunatik](https://github.com/luainkernel/lunatik)
+3. XDP SSL/TLS server name indicator (SNI) blocklist
 4. eBPF based LoxiLB load balancer, Firewall, Proxy, see full features [LoxiLB](https://loxilb-io.github.io/loxilbdocs/#overall-features-of-loxilb)
 
 # Where can I get BPFire installation ISO or flash image?