Tweak on how earliest available slot in schedule is calculated to see if results in more full schedules, a=chris

diff --git a/src/executables/QueueServer.php b/src/executables/QueueServer.php
index 04bf85727..a4c1b7890 100755
--- a/src/executables/QueueServer.php
+++ b/src/executables/QueueServer.php
@@ -2529,7 +2529,7 @@ class QueueServer implements CrawlConstants, Join
                            since check robots every 24 hours as needed
                          */
                         $sites[$next_slot] = [$url, $weight, 0];
-                        $current_crawl_index = $next_slot;
+                        $current_crawl_index++;
                         $delete_urls[$i] = $url;
                         $fetch_size++;
                         $i++;
@@ -2633,8 +2633,6 @@ class QueueServer implements CrawlConstants, Join
                     // has crawl delay but too many already waiting
                     $delete_urls[$i] = $url;
                     //delete from queue (so no clog) but don't mark seen
-                    $i++;
-                    continue;
                 }
             } else { // add a url no crawl delay
                 $next_slot = $this->getEarliestSlot($current_crawl_index,
@@ -2646,7 +2644,7 @@ class QueueServer implements CrawlConstants, Join
                         /* we might miss some sites by marking them
                            seen after only scheduling them
                          */
-                    $current_crawl_index = $next_slot;
+                    $current_crawl_index++;
                     $fetch_size++;
                 } else { //no more available slots so prepare to bail
                     $i = $count;
@@ -2662,7 +2660,8 @@ class QueueServer implements CrawlConstants, Join
         $new_time = microtime(true);
         L\crawlLog("...Scheduler: Done selecting URLS for fetch batch time ".
             "so far:". L\changeInMicrotime($start_time));
-        L\crawlLog("...Scheduler: Examined urls while making fetch batch: $i");
+        L\crawlLog("...Scheduler: Examined urls while making fetch batch:" .
+            ($i - 1));
         $num_deletes = count($delete_urls);
         $k = 0;
         foreach ($delete_urls as $delete_url) {
@@ -2702,7 +2701,7 @@ class QueueServer implements CrawlConstants, Join
             //write schedule to disk
             $fh = fopen(C\CRAWL_DIR.
                 "/schedules/".
-                self::schedule_name.$this->crawl_time . ".txt", "wb");
+                self::schedule_name . $this->crawl_time . ".txt", "wb");
             fwrite($fh, $first_line);
             $num_sites = count($sites);
             $k = 0;