[TCP]: Let TCP_CONG_ADVANCED default to n

It doesn't seem to make much sense to let an "If unsure, say N." option
default to y.

Signed-off-by: Adrian Bunk <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/Kconfig

···
 config TCP_CONG_ADVANCED
 	bool "TCP: advanced congestion control"
 	depends on INET
-	default y
 	---help---
 	  Support for selection of various TCP congestion control
 	  modules.