driver.h: Add remoteOnly member to virConnectDriver struct

This new flag will be set when a driver needs a remote URL in order to
work, as ESX, HyperV and Phyp.
Signed-off-by: NMarcos Paulo de Souza <marcos.souza.org@gmail.com>

src/driver.h

@@ -81,6 +81,8 @@ typedef virConnectDriver *virConnectDriverPtr;
 struct _virConnectDriver {
     /* Wether driver permits a server in the URI */
     bool localOnly;
+    /* Wether driver needs a server in the URI */
+    bool remoteOnly;
     /*
      * NULL terminated list of supported URI schemes.
      *  - Single element { NULL } list indicates no supported schemes