Tidy up invitelabel.
Fix up ctor.
Merge pull request #141 from csmith/master

Update PMD to 5.2.2.
Merge pull request #140 from greboid/tidying

Tidy up invite label.
In theory make DNS plugin work with IPv6.
Merge pull request #142 from greboid/master

In theory make DNS plugin work with IPv6.
Tidy up AliasManagerLinker.
Merge pull request #143 from greboid/master

Tidy up AliasManagerLinker.
Collate plugin PMD reports into one dir.
And ignore the PMD dir.