fix(lookup): QRZ Name is the first name, not first + surname

A log greets an operator; it does not address an envelope. "Robert Smith"
filled the Name field with something no one would ever send on the air, and it
is the first name that gets used when the contact is answered.

So fname alone, with the surname kept only as a last resort for a record that
has no first name at all — better a surname than an empty field. The nickname
option now falls back to the first name too, which is what it should have done
from the start.

joinName went with it: nothing composed a name any more.

changelog.json

@@ -5,12 +5,12 @@
     "en": [
       "Cluster: \"Hide worked\" no longer hides a spot that is a new prefix, county, grid or park in an entity already worked.",
       "DX Cluster: a spot lifetime can be set — 5, 10, 15 minutes or your own value — after which spots leave the list and the band maps.",
-      "Call lookup: an option makes QRZ.com use the operator nickname as the name, falling back to the full name when none is published."
+      "Call lookup: QRZ.com now fills Name with the first name only, and optionally with the operator nickname instead."
     ],
     "fr": [
       "Cluster : « Masquer les contactés » ne masque plus un spot qui est un nouveau préfixe, comté, carré ou parc dans une contrée déjà faite.",
       "Cluster DX : on peut fixer une durée de vie des spots — 5, 10, 15 minutes ou une valeur libre — au-delà de laquelle ils quittent la liste et les band maps.",
-      "Recherche d indicatif : une option fait utiliser à QRZ.com le surnom de l opérateur comme nom, avec repli sur le nom complet s il n y en a pas."
+      "Recherche d indicatif : QRZ.com remplit désormais Nom avec le seul prénom, et au choix avec le surnom de l opérateur."
     ]
   },
   {