Enable libshout output

Packages describing “shout” as local USE flag

Package “shout” Flag Description
media-video/vlc Enable libshout output
net-misc/streamtuner Enable shoutcast plug-in.
media-sound/qmmp Enable shoutcast plug-in via media-libs/libshout.
media-sound/mixxx Enable broadcasting support via media-libs/libshout

All packages providing a “shout” USE flag (3)