* feature: New snmpwalk_group() function
Intended to replace several other snmp functions, but may not behave exactly as they did.
Properly handles multi-line values.
Adds additional index data after the grouping so it isn't lost. Perhaps might make optional.
Might add $skip variable to support fully numeric oid indexes. Thoughts?
* Add e and t options. If we want to specify, options, we can add that later.
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