Max users/connections per stream support

Max number of clients per outgoing stream would be an useful addition and make VLC more scalable in larger setups (think automated loadbalancing).

changed milestone to %Features paradize

Edited description and updated priority and difficulty.

Original author: tumu

changed the description

added Difficulty::easy label

For RTSP VOD there is an option to maximize the number of users:

  --rtsp-throttle-users <integer [-2147483648 .. 2147483647]> 
                             Maximum number of connections
      This limits the maximum number of clients that can connect to the RTSP VOD. 0 means no limit.

added Component::Stream output label