catch up with CISCO-PRODUCTS-MIB.my

[inphobia]

updated to current version, clarified readme did not remove the few trailing whitespace instances that are present in cisco's version

[inphobia]

while i'm at it might as well add see if we can close some more requests as well.

[inphobia]

opengear changes still need to be checked if they don't break the snmp::info module

[JeroenvIS]

Please don't combine the two updates, one PR for Cisco and a separate one for Opengear

[inphobia]

#221 has newer cisco updates, will need to redo opengear