Just some clues.
here is a clue to your answer
http://savonet.sourceforge.net/doc-svn/quick_start.html
"In particular the library pervasives.liq
and its
accompanying scripts should have been installed, otherwise Liquidsoap
won't know the operators which have been defined there."
so if you look in the directory
/usr/lib/airtime/pypo/bin/liquidsoap_scripts/
That's the directory Airtime uses.
Also Key to security of any linux, /etc/ are used mainly used for configuration,stay clear of it where you going have to give permission and ownership to other folders or files
Good Luck
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