fix 350864 enable checking for new news messages at startup, sr=mscott

mailnews/base/prefs/resources/content/am-server.xul

@@ -148,7 +148,7 @@
     <caption label="&serverSettings.label;"/>
     <vbox align="start">
     <checkbox wsm_persist="true"
-              id="server.loginAtStartUp" hidefor="nntp"
+              id="server.loginAtStartUp" 
               label="&loginAtStartup.label;"
               accesskey="&loginAtStartup.accesskey;"
               prefattribute="value"

mailnews/news/src/nsNntpService.cpp

@@ -1507,7 +1507,7 @@ NS_IMETHODIMP
 nsNntpService::GetCanLoginAtStartUp(PRBool *aCanLoginAtStartUp)
 {
   NS_ENSURE_ARG_POINTER(aCanLoginAtStartUp);
-  *aCanLoginAtStartUp = PR_FALSE;
+  *aCanLoginAtStartUp = PR_TRUE;
   return NS_OK;
 }