pf anchor optimization fix

[Richard Kojedzinszky]

Dear OpenBSD team,

I've made this simple patch to pf, to make optimized tables work inside 
anchors.

Please review it, and apply if appropriate, or suggest a solution to my 
simple ruleset, which does not work with 5.6:

anchor in quick proto icmp {
        pass quick from 1.1.1.1
        pass quick from 1.1.1.2
        pass quick from 1.1.1.3
        pass quick from 1.1.1.4
        pass quick from 1.1.1.5
        pass quick from 1.1.1.6
        pass quick from 1.1.1.7
}

Thanks in advance,

Kojedzinszky Richard--- pf_table.c
+++ pf_table.c
@@ -2016,7 +2016,8 @@ pfr_setflags_ktable(struct pfr_ktable *kt, int newf)
        struct pfr_kentryworkq  addrq;
 
        if (!(newf & PFR_TFLAG_REFERENCED) &&
-           !(newf & PFR_TFLAG_PERSIST))
+           !(newf & PFR_TFLAG_PERSIST) &&
+           !(newf & PFR_TFLAG_REFDANCHOR))
                newf &= ~PFR_TFLAG_ACTIVE;
        if (!(newf & PFR_TFLAG_ACTIVE))
                newf &= ~PFR_TFLAG_USRMASK;