Redmine#3429: acceptance test for copy and purge of empty directory
Fix misspelling of daemon
Fix misspelling of Commercial in 607 places
Fix misspelling of available in libutils/man.c
Fix misspelling of overridden in one place
Add acceptance test for empty splice dereference
Merge pull request #1024 from bahamat/master

Fix some spelling mistakes.
Merge pull request #1023 from tzz/tzz/3429-copy-and-purge

Redmine#3429: acceptance test for copy and purge of empty directory