`generate-borgmatic-config` should be symlinked to `/usr/local/bin/`

[agross]

...after installing from pip.

[agross]

validate-borgmatic-config and upgrade-borgmatic-config as well.

[agross]

borgmatic 1.7.5 removed upgrade-borgmatic-config.

validate-borgmatic-config and upgrade-borgmatic-config as well.

borgmatic 1.7.5 deprecated these and the replacement is borgmatic config {validate,generate}.