Ensure ssh-agent services are also enabled

Previously, start_systemd only started the service for the associated
env, rather than also enabling it.

This patch ensures that the service is both enabled and started, and is
also an opportunity to simplify a bit (only issue a single command).

Compatibility note: The --now flag was added in systemd 220 (2015).

Change-Id: Ic1288635e4ed7f79f93dd6beea5b015f45bc828b
1 file changed
tree: 10388826e64beb0e4402971eba43946515d937d1
  1. configs/
  2. debian/
  3. docs/
  4. scripts/
  5. .gitreview
  6. .mailmap