SNMP Frontend, fix handling of snmpd down and memory leaks

If snmpd is down, clixon_snmp does not start
If snmpd stops, clixon_snmp quits
Mem leaks fixed

test/lib.sh

@@ -190,6 +190,9 @@ BUSER=clicon
 
 : ${clixon_snmp_pidfile:="/var/tmp/clixon_snmp.pid"}
 
+# Temporary debug var, set to trigger remaining snmp errors
+: ${snmp_debug:=false}
+
 # Source the site-specific definitions for test script variables, if site.sh
 # exists. The variables defined in site.sh override any variables of the same
 # names in the environment in the current execution.