chore: initial import from KNEL/PFVCluster@041d311 [#769]

Split per O&M lane work order. Full history: KNEL/PFVCluster.
shellcheck debt fixed in librenms-agent (quoting, arithmetic, backticks);
fixes upstream ntp-server.sh bug: input_wakeups reported PACKETSENDFAILURES
instead of INPUTWAKEUPS. mysql.sh (PHP-in-.sh) exempt per house rule.

https://projects.knownelement.com/issues/769#note-4152

smokeping/General

@@ -0,0 +1,84 @@
+*** General ***
+
+owner = Charles N Wyble
+contact = reachableceo@knownelement.com
+mailhost = localhost
+cgiurl = http://tsys-librenms.knel.net:8081/smokeping/smokeping.cgi
+syslogfacility = local0
+# each probe run every 5 minutes, 300 samples = 25 hours at 5min steps
+pagedir = /data/pages
+piddir  = /tmp
+imgcache = /data/cache
+imgurl  = /smokeping/images
+datadir = /data/_data
+dyndir = /data/dyn
+
+*** Database ***
+
+step     = 300
+pings    = 20
+
+# consfn mrhb steps total
+
+AVERAGE  0.5   1  100800
+AVERAGE  0.5  12  43200
+    MIN  0.5  12  43200
+    MAX  0.5  12  43200
+AVERAGE  0.5 144   7200
+    MAX  0.5 144   7200
+    MIN  0.5 144   7200
+
+*** Presentation ***
+
+template = /etc/smokeping/basepage.html
+
++ charts
+
++ detail
+width = 600
+height = 200
+nradius = 5
+
+*** Probes ***
+
++ FPing
+
+binary = /usr/local/bin/fping
+hostinterval = 1.5
+mininterval = 0.001
+offset = 0%
+
+*** Alerts ***
+
+to = reachableceo@knownelement.com
+from = smokeping-alert@tsys-librenms.knel.net
+
++bigloss
+type = loss
+# in percent
+pattern = ==0%,==0%,==0%,==0%,>0%,>0%,>0%
+comment = suddenly there is packet loss
+
++somedoss
+type = loss
+# in percent
+pattern = ==0%,==0%,==0%,==0%,==0%,>0%,>0%,>0%,>0%,>0%,>0%,>0%
+comment = incoming packet loss
+
++startloss
+type = loss
+# in percent
+pattern = >0%,>0%,>0%
+comment = loss at startup
+
++rttdetect
+type = rtt
+# in milliseconds
+pattern = <10,<10,<10,<10,<10,<10,<10,>10,>10,>10
+comment = routing change?
+
++rttbadd
+type = rtt
+# in milliseconds
+pattern = <50,<50,<50,<50,<50,<50,>50,>50,>50,>50
+comment = reroute?