Drop user- prefix from key and cert arguments and config options

README.md

@@ -11,8 +11,8 @@ Create the configuration file `~/.margfools`. The contents are described in the
 If you are using certificate files, add the paths to your TLS private key and certificate in PEM format:
 
     [https://gcsign.example.com/BCSign/]
-    user-key = <path/to/key.pem>
-    user-cert = <path/to/cert.pem>
+    key = <path/to/key.pem>
+    cert = <path/to/cert.pem>
 
 ### Certificates on smartcards
 
@@ -26,7 +26,7 @@ Assuming the ID of your certificate was 07, specify the engine and certificate s
 
     [https://gcsign.example.com/BCSign/]
     engine = pkcs11
-    user-key = 07
+    key = 07
 
 You will be asked for your pin during signing.