Prior to this change the zoneminder component was attempting to
use logging.exception outside of exception handling code. This
would lead to the traceback module throwing an exception when
trying to work out the traceback for the exception.
This fixes the issue by changing the exception call into a
plain error logging call.
* Initial Zoneminder commit
* Fixing bug when ZM sets its function to 'None'
* Adding zoneminder to coverage
* Quick Doc fix
* Update zoneminder.py
Doc Fix
* making the url base optional