scheduler: check daily job limit on each job, not just when choosing AV

sched/sched_send.cpp

@@ -192,6 +192,10 @@ const char* find_user_friendly_name(int appid) {
     return "deprecated application";
 }
 
+// Called at start of request handling.
+// 1) if there's a global jobs/day limit, enforce it using HAV limit
+// 2) if last RPC was yesterday or earlier, clear n_jobs_today for HAV
+//
 static void update_quota(DB_HOST_APP_VERSION& hav) {
     if (config.daily_result_quota) {
         if (hav.max_jobs_per_day == 0) {

sched/sched_version.cpp

@@ -130,6 +130,9 @@ inline int scaled_max_jobs_per_day(DB_HOST_APP_VERSION& hav, HOST_USAGE& hu) {
     return n;
 }
 
+// are we at the jobs/day limit for this (host, app version)?
+// (if so don't use the app version)
+//
 inline bool daily_quota_exceeded(DB_ID_TYPE gavid, HOST_USAGE& hu) {
     DB_HOST_APP_VERSION* havp = lookup_host_app_version(gavid);
     if (!havp) return false;
@@ -668,6 +671,12 @@ BEST_APP_VERSION* get_app_version(
                 }
             }
 
+            // do this check again since we might have sent a job w/ this AV
+            //
+            if (daily_quota_exceeded(bavp->avp->id, bavp->host_usage)) {
+                break;
+            }
+
             if (config.debug_version_select) {
                 app_version_desc(*bavp, buf);
                 log_messages.printf(MSG_NORMAL,