Rename Profile.fqdn to Profile.fqn

It’s not a domain name, so the `d` is not needed.

calsocial/models.py

@@ -204,7 +204,7 @@ class Profile(db.Model):  # pylint: disable=too-few-public-methods
     display_name = db.Column(db.Unicode(length=80), nullable=False)
 
     @property
-    def fqdn(self):
+    def fqn(self):
         ret = ''
 
         if self.user:
@@ -228,7 +228,7 @@ class Profile(db.Model):  # pylint: disable=too-few-public-methods
         if self.display_name:
             ret = self.display_name + ' '
 
-        ret += f'({self.fqdn})'
+        ret += f'({self.fqn})'
 
         return ret