Reapply fix by Florian Pritz: change DATETIME to DATE-TIME in vcards

The rfc [1] only mentions "DATE-TIME" and after this change events
created in the web ui can be imported by lightning. Before it threw a
syntax error.

[1]: https://tools.ietf.org/html/rfc5545



Signed-off-by: Florian Pritz <bluewind@xinu.at>

From commit 71706282

3rdparty/Sabre/VObject/Element/DateTime.php

@@ -70,20 +70,20 @@ class Sabre_VObject_Element_DateTime extends Sabre_VObject_Property {
                 $this->setValue($dt->format('Ymd\\THis'));
                 $this->offsetUnset('VALUE');
                 $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATETIME'); 
+                $this->offsetSet('VALUE','DATE-TIME');
                 break;
             case self::UTC :
                 $dt->setTimeZone(new DateTimeZone('UTC'));
                 $this->setValue($dt->format('Ymd\\THis\\Z'));
                 $this->offsetUnset('VALUE');
                 $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATETIME');
+                $this->offsetSet('VALUE','DATE-TIME');
                 break;
             case self::LOCALTZ :
                 $this->setValue($dt->format('Ymd\\THis'));
                 $this->offsetUnset('VALUE');
                 $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATETIME');
+                $this->offsetSet('VALUE','DATE-TIME');
                 $this->offsetSet('TZID', $dt->getTimeZone()->getName());
                 break; 
             case self::DATE :

3rdparty/Sabre/VObject/Element/MultiDateTime.php

@@ -60,7 +60,7 @@ class Sabre_VObject_Element_MultiDateTime extends Sabre_VObject_Property {
                     $val[] = $i->format('Ymd\\THis');
                 }
                 $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATETIME'); 
+                $this->offsetSet('VALUE','DATE-TIME');
                 break;
             case Sabre_VObject_Element_DateTime::UTC :
                 $val = array();
@@ -69,7 +69,7 @@ class Sabre_VObject_Element_MultiDateTime extends Sabre_VObject_Property {
                     $val[] = $i->format('Ymd\\THis\\Z');
                 }
                 $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATETIME');
+                $this->offsetSet('VALUE','DATE-TIME');
                 break;
             case Sabre_VObject_Element_DateTime::LOCALTZ :
                 $val = array();
@@ -77,7 +77,7 @@ class Sabre_VObject_Element_MultiDateTime extends Sabre_VObject_Property {
                     $val[] = $i->format('Ymd\\THis');
                 }
                 $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATETIME');
+                $this->offsetSet('VALUE','DATE-TIME');
                 $this->offsetSet('TZID', $dt[0]->getTimeZone()->getName());
                 break; 
             case Sabre_VObject_Element_DateTime::DATE :