Merge pull request #45694 from neersighted/check-config_xt_bpf

contrib/check-config: check for xt_bpf

contrib/check-config.sh

@@ -220,6 +220,7 @@ check_flags \
 	VETH BRIDGE BRIDGE_NETFILTER \
 	IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
 	NETFILTER_XT_MATCH_ADDRTYPE \
+	NETFILTER_XT_MATCH_BPF \
 	NETFILTER_XT_MATCH_CONNTRACK \
 	NETFILTER_XT_MATCH_IPVS \
 	NETFILTER_XT_MARK \