cppcheck: Use inline suppression for strtok() in conf.c

strtok() is non-reentrant and old-fashioned, so cppcheck would complains
about its use in conf.c if it weren't suppressed.  We're single threaded
and strtok() is convenient though, so it's not really worth reworking at
this time.  Convert this to an inline suppression so it's adjacent to the
code its annotating.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Makefile

@@ -287,7 +287,6 @@ cppcheck: $(SRCS) $(HEADERS)
 	--suppress=va_list_usedBeforeStarted:util.c			\
 	--suppress=unusedFunction					\
 	--suppress=knownConditionTrueFalse:conf.c			\
-	--suppress=strtokCalled:conf.c					\
 	--suppress=localtimeCalled:pcap.c				\
 	--suppress=unusedStructMember:pcap.c				\
 	--suppress=unusedStructMember:dhcp.c				\

conf.c

@@ -410,10 +410,12 @@ static void get_dns(struct ctx *c)
 			if (end)
 				*end = 0;
 
+			/* cppcheck-suppress strtokCalled */
 			if (!strtok(line, " \t"))
 				continue;
 
 			while (s - c->dns_search < ARRAY_SIZE(c->dns_search) - 1
+			       /* cppcheck-suppress strtokCalled */
 			       && (p = strtok(NULL, " \t"))) {
 				strncpy(s->n, p, sizeof(c->dns_search[0]));
 				s++;