Manpages of src:music in Debian testing

• contsink(1)
• eventcounter(1)
• eventgenerator(1)
• eventlogger(1)
• eventselect(1)
• eventsink(1)
• eventsource(1)
• messagesource(1)
• music(1)
• music_tests(1)
• musicrun(1)
• viewevents(1)