No subject

[myGoogleCal]
type=caldav
url=https://www.google.com/calendar/dav/<Gmail Email Address>/events/
user=<Gmail Email Address>
secret=<Gmail Password>
refresh=15
timeframe=60

Custom configuration:

[calendar_contextscrubbedsinternet_302]
type            =  caldav
url             =  https://www.google.com/calendar/dav/contextscrubbedsml@contextscrubbednt.net/events/
user            =  contextscrubbedsml at contextscrubbednt.net
secret          =  scrubbed
refresh         =  15
timeframe       =  60
channel         =  SIP/contextscrubbeds-302
context         =  contextscrubbedsinternet
extension       =  302

Also from Asterisk CLI, everythings seems fine:
test*CLI> calendar show calendars
Calendar             Type       Status
--------             ----       ------
calendar_contextscrubbedsinterne caldav     free

scopserv*CLI> calendar show calendar calendar_contextscrubbedsinternet_302
Name              : calendar_contextscrubbedsinterne
Notify channel    : SIP/contextscrubbeds-302
Notify context    : contextscrubbedsinternet
Notify extension  : 302
Notify applicatio :
Notify appdata    :
Refresh time      : 15
Timeframe         : 60
Autoreminder      : 0
Events

[2012-10-10 13:33:11] WARNING[1554]: res_calendar_caldav.c:157 caldav_request: Unknown response to CalDAV calendar calendar_contextscrubbedsinternet_302, request REPORT to /calendar/dav/contextscrubbedsml at contextscrubbednt.net/events/: SSL handshake failed: SSL error: GnuTLS internal error.

And

[2012-10-11 16:47:13] WARNING[12040]: res_calendar_icalendar.c:150 fetch_icalendar: Unable to retrieve iCalendar 'calendar_contextscrubbedsinternet_302' from 'https://mail.contextscrubbednt.net/ical/main.ics': Could not authenticate to server: missing realm in Basic challenge
[2012-10-11 16:47:13] WARNING[12040]: res_calendar_icalendar.c:472 ical_load_calendar: Unable to parse iCalendar 'calendar_contextscrubbedsinternet_302'




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