`job` for experimental

Various commands for working with background jobs.

Signature

> job {flags}

input	output
nothing	string

You must use one of the following subcommands. Using this command as-is will only produce this help message.

name	description	type
`job flush`	Clear this job's mailbox.	built-in
`job id`	Get id of current job.	built-in
`job kill`	Kill a background job.	built-in
`job list`	List background jobs.	built-in
`job recv`	Read a message from the mailbox.	built-in
`job send`	Send a message to the mailbox of a job.	built-in
`job spawn`	Spawn a background job and retrieve its ID.	built-in
`job tag`	Add a description tag to a background job.	built-in
`job unfreeze`	Unfreeze a frozen process job in foreground.	built-in