Upgrading from last tagged version v2.6.1 severely breaks existing installation due to modified default of consul_data_path

[MartinAhrer]

Commit e8ad89ba7a7562d386ce2c5dae30059c1d3c3913 introduced a new consul_data_path default value of "/opt/consul" which was "/var/consul" previously. This breaks several cluster installations.

There is certainly a workaround, setting the value back to the original default. But I question why that breaking change was made and why it is not documented more prominent.