unbound: Enable TCP fast open

This can reduce the lookup times for TCP lookups with a full RTT for
supported servers.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>

net/unbound/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=unbound
 PKG_VERSION:=1.7.1
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE
@@ -113,6 +113,8 @@ CONFIGURE_ARGS += \
 	--disable-dsa \
 	--disable-gost \
 	--enable-allsymbols \
+	--enable-tfo-client \
+	--enable-tfo-server \
 	--with-libexpat="$(STAGING_DIR)/usr" \
 	--with-ssl="$(STAGING_DIR)/usr" \
 	--with-pidfile=/var/run/unbound.pid \