use __func__ in iked util.c log_debug

[Rob Pierce]

ok?

Index: util.c
===================================================================
RCS file: /cvs/src/sbin/iked/util.c,v
retrieving revision 1.35
diff -u -p -r1.35 util.c
--- util.c      13 Dec 2017 08:27:06 -0000      1.35
+++ util.c      22 Jun 2018 12:52:09 -0000
@@ -703,7 +703,7 @@ expand_string(char *label, size_t len, c
        char *p, *q;
 
        if ((tmp = calloc(1, len)) == NULL) {
-               log_debug("expand_string: calloc");
+               log_debug("%s: calloc", __func__);
                return (-1);
        }
        p = q = label;
@@ -711,7 +711,7 @@ expand_string(char *label, size_t len, c
                *q = '\0';
                if ((strlcat(tmp, p, len) >= len) ||
                    (strlcat(tmp, repl, len) >= len)) {
-                       log_debug("expand_string: string too long");
+                       log_debug("%s: string too long", __func__);
                        free(tmp);
                        return (-1);
                }
@@ -719,7 +719,7 @@ expand_string(char *label, size_t len, c
                p = q;
        }
        if (strlcat(tmp, p, len) >= len) {
-               log_debug("expand_string: string too long");
+               log_debug("%s: string too long", __func__);
                free(tmp);
                return (-1);
        }