Пакет alterator-netinst: Информация

- alterator-netinst: fix help for option '-v'

- run select image only once after change all options
- backend3/netinst: disable debug to /tmp/log
- bin/alterator-netinst: do not remount current image
- bin/alterator-netinst: fix extra spaces in config, when add vnc
- bin/alterator-netinst: fix typo in help

- bin/alterator-netinst: add missing help about option -v
- bin/alterator-netinst: fix disable vnc option (Closes: 46975)
- Add option "Autoinstall" (Closes: 45970)
- Fix update webpage and cleanup tftpboot directory, when removed selected image
  (Closes: 40265, 46599)