Scram-Sha-1 mechanism : do not send authzid if it not absolutely necessary
Some servers (ejabberd) reject the challenge if the
scram attributes a (authzid) and n (authcid) are equals
or they just don't handle the authzid.
So we just don't send it if they are the same
This fix #484
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/contact_list_context_menu_chat_item"
android:title="@string/CDChat">
<menu>
</menu>
</item>
<item android:id="@+id/contact_list_context_menu_call_item"
android:title="@string/CDCall" android:visible="false" />
<item android:id="@+id/contact_list_context_menu_user_info"
android:title="@string/CDInfos">
<menu>
<item android:id="@+id/contact_list_context_menu_userinfo_alias"
android:title="@string/userinfo_label_alias" />
<item android:id="@+id/contact_list_context_menu_userinfo_group"
android:title="@string/userinfo_label_chg_group" />
<item android:id="@+id/contact_list_context_menu_userinfo_subscription"
android:title="@string/userinfo_label_re_subscription" />
<item android:id="@+id/contact_list_context_menu_userinfo_block"
android:title="@string/userinfo_label_block" android:visible="false" />
<item android:id="@+id/contact_list_context_menu_userinfo_delete"
android:title="@string/userinfo_label_delete" />
</menu>
</item>
</menu>