snmpnetstat: add page (#15869)

pages/common/snmpnetstat.md

@@ -0,0 +1,8 @@
+# snmpnetstat
+
+> Fetch networking status using SNMP.
+> More information: <https://manned.org/snmpnetstat>.
+
+- Fetch the networking status:
+
+`snmpnetstat -v {{version}} -c {{community}} {{ip}}`