usr: osh: Introduce '&' for background tasksexpt

Previously, when running programs from the shell. The execution must
finish before anything else can be done. This commit allows users to add
an ampersand ('&') after the command in order to run it in the
background. This is an example of its usage:

--
@ beep at 400 Hz for 9000ms (to annoy people for fun).
@ We will be running it in the background and do a 'kstat'
@ to see that the number of tasks have increased.

beep 400 9000 &
kstat

..
--

Signed-off-by: Ian Moffett <ian@osmora.org>

0 files changed, 0 insertions, 0 deletions