2 Steve: minor updates in nnBackup docs

[VK]

JFYI: the nnBackup docs were slightly updated:

1) There is a new description of the '-d' option in command_line.htm
2) New question/answer 'Folders are not deleted in sync mode when -da option is used without the -s option!' in add_info/faq.htm

[Steve]

done
email sent !

[VK]

I have uploaded the files and changed the link to 'nnbackup.css' in 'faq.htm' (from 'nnbackup.css' to '../nnbackup.css').

Thank you a lot for your help!

[Steve]

ok