Corrected the mess caused by introducing default_nettype none into the design
verification netlists.  Also cleaned up the broken power-on-reset signaling,
and added connections from the user space to the I/O pad direct-to-pad analog
signal pins.
diff --git a/verilog/rtl/gpio_control_block.v b/verilog/rtl/gpio_control_block.v
index f9764ed..8ccdfdd 100644
--- a/verilog/rtl/gpio_control_block.v
+++ b/verilog/rtl/gpio_control_block.v
@@ -125,6 +125,7 @@
 
     wire user_gpio_in;
     wire gpio_in_unbuf;
+    wire gpio_logic1;
 
     /* Serial shift for the above (latched) values */
     reg [PAD_CTRL_BITS-1:0] shift_register;
@@ -232,3 +233,4 @@
     );
 
 endmodule
+`default_nettype wire