include_once (freebusy-GET.php) (line 43)

We also allow URLs like .../freebusy.php/user@example.com to work, so long as the e-mail matches a single user whose calendar we have rights to.

NOTE: It is OK for there to *be* duplicate e-mail addresses, just so long as we only have read permission (or more) for only one of them.

require_once (CalDAVRequest.php) (line 24)

Submission parameters recommended by calconnect, plus some generous alternatives