v0.15.0: Alpha release #6

This release contains bug fixes and new features.

Changes:

• New dinit-monitor utility can be used to perform notifications (via an external command, such as notify-send) when a service changes state. This is primarily intended for users running dinit in "user mode" rather than for system instances of dinit, although it works in either case. See the dinit-monitor(8) manual page for details.
• Support on Linux for running service processes in a cgroup, via the runs-in-cgroup service setting. Cgroups must be mounted/created outside of dinit (eg via an early service), there is no support for this in dinit itself. See the dinit-service(5) manual page for details.
• dinitctl's enable, disable and rmdep subcommands now give better feedback in various situations. For example, dinitctl disable will warn if a disabled service has other dependents (which may cause it to start anyway).
• When parse errors occur in service description files, the relevant line number should now be reported (by dinitcheck, or in the dinit log).
• Environment variable substitution in command lines is now performed for the stop-command setting in exactly the same way as for the command setting. Previously, by oversight, substitution was not performed for the stop-command setting.
• Fix: start timeout was not being honoured for service restarts.