Add module tags to documentation for res_jabber/res_xmpp

Since res_jabber/res_xmpp provide the same APIs (app/func/manager/etc.),
the XML documentation for each needs to call out which module is providing
the documentation. The module attribute has been added to the various XML
fragments for this purpose.



git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@379209 f38db490-d61c-443f-a65b-d21fe96a405b
Update the dtd to actually *support* the module attribute in all elements

Mea culpa.


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@379210 f38db490-d61c-443f-a65b-d21fe96a405b