Fix mid-sentence stop, no reference

In addition to some other minor changes.
Align comments
Fix for typos picked up by lintian
Merge pull request #7145 from holmboe/doc-ssh-roster

Fix mid-sentence stop, no reference to Rosters
Merge pull request #7146 from joehealy/doc_typos

Fix for typos picked up by lintian
Fix indentation issues.