hiding struct ifnet diff #3: pfvar.h

[Mike Belopuhov]

pfctl shares some structures (namely pfi_kif) with the kernel but
doesn't use the ifnet pointer so it gets a bunch of forward
declarations for ifnet and interface group structures.

OK?

diff --git sys/net/pfvar.h sys/net/pfvar.h
index 37f61e4..a05fc49 100644
--- sys/net/pfvar.h
+++ sys/net/pfvar.h
@@ -1190,10 +1190,13 @@ extern struct pf_state_tree      pf_statetbl;
 /* keep synced with pfi_kif, used in RB_FIND */
 struct pfi_kif_cmp {
        char                             pfik_name[IFNAMSIZ];
 };
 
+struct ifnet;
+struct ifg_group;
+
 struct pfi_kif {
        char                             pfik_name[IFNAMSIZ];
        RB_ENTRY(pfi_kif)                pfik_tree;
        u_int64_t                        pfik_packets[2][2][2];
        u_int64_t                        pfik_bytes[2][2][2];