virnetdaemon: Store servers in a hash table

Since the daemon can manage and add (at fresh start) multiple servers,
we also should be able to add them from a JSON state file in case of a
daemon restart, so post exec restart support for multiple servers is also
provided. Patch also updates virnetdaemontest accordingly.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>

src/logging/log_daemon.c

@@ -160,7 +160,7 @@ virLogDaemonNew(virLogDaemonConfigPtr config, bool privileged)
         goto error;
 
     if (!(logd->dmn = virNetDaemonNew()) ||
-        virNetDaemonAddServer(logd->dmn, logd->srv) < 0)
+        virNetDaemonAddServer(logd->dmn, "virtlogd", logd->srv) < 0)
         goto error;
 
     if (!(logd->handler = virLogHandlerNew(privileged,
@@ -209,6 +209,7 @@ virLogDaemonNewPostExecRestart(virJSONValuePtr object, bool privileged)
         goto error;
 
     if (!(logd->srv = virNetDaemonAddServerPostExec(logd->dmn,
+                                                    "virtlogd",
                                                     virLogDaemonClientNew,
                                                     virLogDaemonClientNewPostExecRestart,
                                                     virLogDaemonClientPreExecRestart,