because takserver and LDAP Reasons:tm: do not suffix the tak-client s…

…pecific cert CN

src/takrmapi/tak_helpers.py

@@ -42,7 +42,7 @@ def callsign(self) -> str:
     @property
     def certcn(self) -> str:
         """return CN for the special cert"""
-        return f"{self.user.callsign}_tak"
+        return self.user.callsign
 
     @property
     def rm_certpem(self) -> str: