### Description
Remove the liquidsoap connection lock to remove any chance to run into a
deadlock. With this change, the client is not thread safe anymore.
Also handle connection error exception when talking to liquidsoap, e.g.
when liquidsoap is restarted and closes the telnet connection.
**This is a new feature**:
No
**I have updated the documentation to reflect these changes**:
Not relevant.
### Testing Notes
- Restart liquidsoap while playout is talking to it.
- See the connection being dropped and playout that might run into a
deadlock.
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