Support for "inner" jingles

[denis-stepanov]

Some channels insert a third - presumably - different jingle in the middle of ads block. These may confuse AdVent and cause premature restoration of sound. The task would be to add support for a "inner" jingle flag in the AdVent database. When a jingle with such a flag is detected, the processing logic is modified as follows:

1. if the jingle is detected in the midst of ads block, its "exit" flag is reset to false (& 0) before processing;
2. if the jingle is detected outside of the ads block, its "entry" flag is set to true (| 1) before processing.

The rest of processing should happen as usual.

[denis-stepanov]

After some monitoring, it looks like the inner jingle is not much different from the others. But it is often being used consistently, e.g. for movies in prime time the ads break is longer and a third jingle is used. So one possibility could be to add a command line option to inform AdVent about 2 or 3-jingle mode (n-jingle in general). In 3-jingle mode the exit jingle found inside action would be ignored.