pfctl: host(): remove now unused r buffer

[Klemens Nanni]

`r' is a left over from before my AF swipe.

While here, use __func__. Now I can start syncing daemons in base.

OK?

Index: pfctl_parser.c
===================================================================
RCS file: /cvs/src/sbin/pfctl/pfctl_parser.c,v
retrieving revision 1.334
diff -u -p -r1.334 pfctl_parser.c
--- pfctl_parser.c      10 Sep 2018 20:53:53 -0000      1.334
+++ pfctl_parser.c      10 Sep 2018 22:35:00 -0000
@@ -1612,11 +1612,11 @@ host(const char *s, int opts)
 {
        struct node_host        *h = NULL, *n;
        int                      mask = -1;
-       char                    *p, *r, *ps, *if_name;
+       char                    *p, *ps, *if_name;
        const char              *errstr;
 
        if ((ps = strdup(s)) == NULL)
-               err(1, "host: strdup");
+               err(1, "%s: strdup", __func__);
 
        if ((if_name = strrchr(ps, '@')) != NULL) {
                if_name[0] = '\0';
@@ -1624,16 +1624,13 @@ host(const char *s, int opts)
        }
 
        if ((p = strrchr(ps, '/')) != NULL) {
-               if ((r = strdup(ps)) == NULL)
-                       err(1, "host: strdup");
                mask = strtonum(p+1, 0, 128, &errstr);
                if (errstr) {
                        fprintf(stderr, "netmask is %s: %s\n", errstr, p);
                        goto error;
                }
                p[0] = '\0';
-       } else
-               r = ps;
+       }
 
        if ((h = host_if(ps, mask)) == NULL &&
            (h = host_ip(ps, mask)) == NULL &&
@@ -1645,15 +1642,13 @@ host(const char *s, int opts)
        if (if_name && if_name[0])
                for (n = h; n != NULL; n = n->next)
                        if ((n->ifname = strdup(if_name)) == NULL)
-                               err(1, "host: strdup");
+                               err(1, "%s: strdup", __func__);
        for (n = h; n != NULL; n = n->next) {
                n->addr.type = PF_ADDR_ADDRMASK;
                n->weight = 0;
        }       
 
 error:
-       if (r != ps)
-               free(r);
        free(ps);
        return (h);
 }