[CONTRIB] halog: minor speed improvement in timer parser

The timer parser looks for the next slash after the last timer, which is
very far away. Those 4 occurrences have been fixed to match the way it's
done in URL sorting, which is faster. Average speed gain is 5-6% on -srv
and -pct.
(cherry picked from commit 3555671c93695f48c02ef05c8bb228523f17ca20)

Author: wtarreau

contrib/halog/halog.c

@@ -502,17 +502,19 @@ int main(int argc, char **argv)
 			}
 
 			e = field_stop(b + 1);
-			/* we have field TIME_FIELD in [b]..[e-1] */
+			/* we have field TIME_FIELD in [b]..[e-1], let's check only the response time */
 
 			p = b;
 			err = 0;
-			for (f = 0; f < 4 && *p; f++) {
+			f = 0;
+			while (*p) {
 				tps = str2ic(p);
 				if (tps < 0) {
 					tps = -1;
 					err = 1;
 				}
-
+				if (++f == 4)
+					break;
 				SKIP_CHAR(p, '/');
 			}
 
@@ -577,13 +579,15 @@ int main(int argc, char **argv)
 
 			p = b;
 			err = 0;
-			for (f = 0; f < 5 && *p; f++) {
+			f = 0;
+			while (*p) {
 				array[f] = str2ic(p);
 				if (array[f] < 0) {
 					array[f] = -1;
 					err = 1;
 				}
-
+				if (++f == 5)
+					break;
 				SKIP_CHAR(p, '/');
 			}
 
@@ -740,13 +744,15 @@ int main(int argc, char **argv)
 
 			p = b;
 			err = 0;
-			for (f = 0; f < 5 && *p; f++) {
+			f = 0;
+			while (*p) {
 				array[f] = str2ic(p);
 				if (array[f] < 0) {
 					array[f] = -1;
 					err = 1;
 				}
-
+				if (++f == 5)
+					break;
 				SKIP_CHAR(p, '/');
 			}