MT#10879 Increase mailbox column to fit uuid.

Needed for when there is no primary number.

Change-Id: I618bbd83fb74ea369ecdd697fcd06dda45949b57

db_scripts/diff/15140.up

@@ -0,0 +1,2 @@
+USE kamailio;
+alter table kamailio.voicemail_users change column mailbox mailbox varchar(64) NOT NULL;