QError: Introduce QERR_IO_ERROR

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/qerror.c b/qerror.c
index 656efc2..b544ced 100644
--- a/qerror.c
+++ b/qerror.c
@@ -149,6 +149,10 @@
         .desc      = "Password incorrect",
     },
     {
+        .error_fmt = QERR_IO_ERROR,
+        .desc      = "An IO error has occurred",
+    },
+    {
         .error_fmt = QERR_JSON_PARSING,
         .desc      = "Invalid JSON syntax",
     },