Merge pull request #1301 in FS/freeswitch from ~ANDYWOLK/freeswitch:feature/FS-10377-add-fax-document-total-pages-to to master

* commit '2c822ed4':
  FS-10377 [mod_spandsp] Add fax-document-total-pages to spandsp::txfaxnegociateresult and spandsp::txfaxpageresult events