setvolume: implement some common features

unmute when increasing volume, mute at the minimum volume, don't decrease volume when muted

Change-Id: Ifd671b2a8d7d8a4da2bc15adc18f9aa7c46e66d2
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6017
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

setvolume: detailed usage info, print mute state

* Describe parameters in "usage".
* Change -m to explicitely mute, instead of toggling mute.
* Add -t to toggle muting, -u to unmute.
* Add long version options:
--mute, --unmute, --togglemute --increase, --decrease
* Accept a step size as additional parameter to in/decrease,
without it, the step size is 3 dB.
* Print muting state when toggling or un/muting.
* Update shortcut_settings to use "setvolume -t" to toggle muting.

Change-Id: Iacad5bcf4a40a6056c85161ac45379015392420c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5976
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Reviewed-by: nephele <nep@packageloss.eu>

setvolume: add options to mute, increment, decrement the master volume

also set the background flag

Change-Id: Ie198476d666a0cd290520d15534afa3a73cf8a1f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5936
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

Moved bin/ directory out of apps/.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11909 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved bin/ directory out of apps/.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11909 a95241bf-73f2-0310-859d-f6bbb57e9c96