Werk #13574: Update net-snmp lib to 5.9.1

Component Inline SNMP
Title Update net-snmp lib to 5.9.1
Date Feb 4, 2022
Level Prominent Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.1.0b1 Checkmk Enterprise (CEE), Checkmk MSP (CME)

We now ship omd with the net-snmp lib in version 5.9.1. This was motivated by several reasons: * The previously used net-snmp lib had a bug in the python C binding which caused any higher auth protocol then SHA/MD5 not working. (e.g. SHA256, SHA512 etc.). This affected the inline SNMP mode in checkmk only. * The net-snmp project had a long time no releases. So we now want to go for the latest release.

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