Igmpproxy has timer functionality to perform periodic actions like sending
general/group specific igmp queries and aging out active routes. Timer logic
is incorrect while computing remaining time to invoke callbacks, this causes
more frequent igmp queries. Fixed the issue by correcting the timer logic.

Reviewed on https://chromium-review.googlesource.com/2210133

---
diff -Naur --show-c-function a/src/igmpproxy.c b/src/igmpproxy.c
--- a/src/igmpproxy.c	2020-05-19 23:05:57.902280428 -0700
+++ b/src/igmpproxy.c	2020-05-19 23:17:41.215848372 -0700
@@ -338,7 +338,7 @@ void igmpProxyRun(void) {
              * call gettimeofday.
              */
             if (Rt == 0) {
-                curtime.tv_sec = lasttime.tv_sec + secs;
+                curtime.tv_sec = lasttime.tv_sec + ((secs > 3) ? 3 : secs);
                 curtime.tv_nsec = lasttime.tv_nsec;
                 Rt = -1; /* don't do this next time through the loop */
             } else {