Update lang keys

lang/en.inc.php

@@ -88,7 +88,7 @@
 $messages['label_pwdreset'] = "Reset password at next connection";
 $messages['label_result'] = "Result";
 $messages['label_secretary'] = "Secretary";
-$messages['label_startdate'] = "Start of validity";
+$messages['label_starttime'] = "Start of validity";
 $messages['label_state'] = "State";
 $messages['label_street'] = "Street";
 $messages['label_title'] = "Title";
@@ -113,7 +113,7 @@
 $messages['search'] = "Search";
 $messages['searchrequired'] = "Please enter your search";
 $messages['sizelimit'] = "Size limit has been reached, some entries could not be displayed";
-$messages['starttime'] = "Start date";
+$messages['startdate'] = "Start date";
 $messages['submit'] = "Submit";
 $messages['title'] = "Service Desk";
 $messages['title_search'] = "Search results:";