sysctl: Clarify net.ipv4.tcp_ecn value

The default value of `2` already enables ECN, but only for outgoing connections. A value of `1` enables it
for incoming connections too.

Signed-off-by: Eric Naim <[email protected]>

Author: 1Naim

usr/lib/sysctl.d/99-cachyos-settings.conf

@@ -49,7 +49,7 @@ kernel.kexec_load_disabled = 1
 # Using the value 3 instead of the default 1 allows TCP Fast Open for both incoming and outgoing connections:
 net.ipv4.tcp_fastopen = 3
 
-# TCP Enable ECN Negotiation by default
+# TCP Enable ECN Negotiation for both outgoing and incoming connections
 net.ipv4.tcp_ecn = 1
 
 # TCP Reduce performance spikes