Dial plan: handle phone numbers with 8 digits with a 0 before for Belgium. A std::function mNationalNumberLengthFunction has been added in the DialPlan class to handle the case where a 0 must be removed from the start of a phone number but the number of digits, including the 0, is not more than the maximal number in the national dial plan. Such function has been added for Belgium. By default the function mNationalNumberLengthFunction is nullptr.
ticket Mantis : https://bugs.linphone.org/view.php?id=13421 ticket Jira : https://linphone.atlassian.net/browse/SDK-398