Proposed changes

Add a dmesg log plugin to the out-of-the-box features. The dmesg plugin only provide one type called "all" due to the vast differences in the dmesg implementations (e.g. busybox/bsd don't support filtering by log facility or datetime).

The plugin will attempt to call dmesg with a datetime filter, however if it fails for any reason, then dmesg will be called without any arguments (and in this case all the messages will be returned). This is due to the various implementations of dmesg.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s. You can activate automatic signing by running just prepare-dev once)
• I ran just format as mentioned in CODING_GUIDELINES
• I used just check as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments