cron: migrate away from minicron usage

Makefile

@@ -85,7 +85,6 @@ CORE_DEPENDS?=		apinger \
 			isc-dhcp43-relay \
 			isc-dhcp43-server \
 			lighttpd \
-			minicron \
 			miniupnpd \
 			mpd5 \
 			ngattach \

src/etc/inc/services.inc

@@ -2371,11 +2371,19 @@ function configure_cron()
 
     $autocron = array();
 
-    $autocron[] = generate_cron_job('/usr/local/sbin/expiretable -v -t 3600 webConfiguratorlockout', '*/60');
-    $autocron[] = generate_cron_job('/usr/local/sbin/expiretable -v -t 3600 sshlockout', '*/60');
-    $autocron[] = generate_cron_job('/usr/local/sbin/expiretable -v -t 3600 virusprot', '*/60');
-    $autocron[] = generate_cron_job('/usr/local/etc/rc.update_urltables', '30', '12');
-    $autocron[] = generate_cron_job('/usr/local/etc/rc.dyndns.update', '1', '1');
+    /* hourly */
+    $autocron[] = generate_cron_job('/usr/local/sbin/expiretable -v -t 3600 webConfiguratorlockout', '1');
+    $autocron[] = generate_cron_job('/usr/local/sbin/expiretable -v -t 3600 sshlockout', '2');
+    $autocron[] = generate_cron_job('/usr/local/sbin/expiretable -v -t 3600 virusprot', '3');
+    $autocron[] = generate_cron_job('/usr/local/etc/rc.expireaccounts', '5');
+
+    /* daily */
+    $autocron[] = generate_cron_job('/usr/local/etc/rc.update_alias_url_data', '1', '1');
+    $autocron[] = generate_cron_job('/usr/local/etc/rc.update_urltables', '5', '1');
+    $autocron[] = generate_cron_job('/usr/local/etc/rc.dyndns.update', '11', '1');
+
+    /* every now and then */
+    $autocron[] = generate_cron_job('/usr/local/sbin/ping_hosts.sh', '*/4');
 
     if (!empty($config['system']['rrdbackup'])) {
        $autocron[] = generate_cron_job('/usr/local/etc/rc.backup_rrd', '0', '*/' . $config['system']['rrdbackup']);

src/etc/rc

@@ -250,15 +250,6 @@ echo "done."
 # starting standard rc scripts
 /usr/local/etc/rc.opnsense start
 
-# Start ping handler every 240 seconds
-/usr/local/bin/minicron 240 /var/run/ping_hosts.pid /usr/local/sbin/ping_hosts.sh
-
-# Start account expire handler every hour
-/usr/local/bin/minicron 3600 /var/run/expire_accounts.pid /usr/local/etc/rc.expireaccounts
-
-# Start alias url updater every 24 hours
-/usr/local/bin/minicron 86400 /var/run/update_alias_url_data.pid /usr/local/etc/rc.update_alias_url_data
-
 /usr/local/sbin/beep.sh start
 
 /usr/local/etc/rc.initial.banner