Fixing two broken links in the User Guide.

Really fix bcit-ci#1715

Merge branch 'hotfix/2.1.2'

Retagging 2.1.1 for version number corrections

Readded PDO drivers.

retagging v2.0.3 - the old tag contained a change log item that is st…

…ill in develop, no code changes were made

Releasing 2.0.3