net/nmsg: Upgrade to 1.1.2

1.1.2:

• Now allow nmsgtool --setgroup, --setoperator, and --setsource to work with --writepres and --writejson outputs.
• Permit nmsgtool --setgroup and --setoperator to use a numerical value.
• Unmatched group and operator aliases in presentation format now display as the numerical values instead of (null).
• Ensure mis-running nmsgtool results in failure exit code.
• Fix output buffering for JSON outputs.
• Fix magic length calculation in nmsg_json.
• Terminate strbuf data at initialization.

Disabling the JSON_C option no longer breaks the build.

The DOXYGEN build requiers perl.

MFH: 2023Q4
Sponsored by: DomainTools LLC