fixup: less contrived nick+server auth example [skip ci]

Author: dgw

docs/source/configuration.rst

@@ -434,7 +434,7 @@ your IRC network's requirements::
 
     [core]
     client_cert_file = /path/to/cert.pem  # your bot's client certificate
-    # SASL is not always required for CertFP; check your network's help
+    # some networks require SASL EXTERNAL for CertFP to work
     auth_method = sasl                    # if required
     auth_target = EXTERNAL                # if required
 
@@ -487,16 +487,16 @@ Or you can combine NickServ ``IDENTIFY`` and CertFP::
 
     [core]
     # nick-based auth
-    auth_method = nickserv         # select nick-based auth
-    # auth_username is not required for nickserv
-    auth_password = SopelIsGreat!  # your bot's password
-    auth_target = NickServ         # default value
-
-    # CertFP with SASL requirement
     client_cert_file = /path/to/cert.pem  # your bot's client certificate
+    # some networks require SASL EXTERNAL for CertFP to work
+    auth_method = sasl                    # if required
+    auth_target = EXTERNAL                # if required
+
+    # server-based auth
     # SASL is not always required for CertFP; check your network's help
-    server_auth_method = sasl             # if required
-    server_auth_target = EXTERNAL         # if required
+    server_auth_method = server               # select server auth
+    # server_auth_username is not required for this method
+    server_auth_password = TheBestIRCNetEver  # password for server access
 
 .. important::