Squash more sphinx warnings

doc/sphinx/users-guide/vcl-backends.rst

@@ -205,6 +205,7 @@ initial
 
 
 .. XXX: Where and why? benc
+
 Now we define the 'director'::
 
     import directors;
@@ -214,6 +215,7 @@ Now we define the 'director'::
         { .backend = server2; }
     }
 
+
 You use this director just as you would use any other director or
 backend. Varnish will not send traffic to hosts that are marked as
 unhealthy. Varnish can also serve stale content if all the backends are

doc/sphinx/users-guide/vcl-syntax.rst

@@ -98,8 +98,7 @@ To call a subroutine, use the call keyword followed by the subroutine's name::
   call pipe_if_local;
 
 Varnish has quite a few built in subroutines that are called for each
-transaction as it flows through Varnish. These builtin subroutines are all named vcl_*. Your own subroutines cannot start their name with vcl_.
+transaction as it flows through Varnish. These builtin subroutines are all
+named `vcl_*`. Your own subroutines cannot start their name with `vcl\_`.
 
 .. XXX:looks as bit funky as red text? benc
-
-See :ref:`vcl-built-in-subs`.