case sensitive OS should not complain about duplicate files

Running addfiles

Added xq-fblist.zip
!Error smb_addfile duplicate name found: xq-fsx.zip adding xq-fsx.zip

bbs@bbs:/sbbs/data/dirs/fsxnet/fsxfilefsx_mutl$ ls -l xq-fsx* XQ-FSX*
-rw-r--r-- 1 bbs bbs 9423 Sep 14 14:55 xq-fsx.zip
-rw-r--r-- 1 bbs bbs 9423 Sep 14 14:55 XQ-FSX.ZIP

Not a good case because these are duplicate files, but it could be possible to have two different files with the name with unix and other case sensitive file systems. I should be able to have xq-fsx.zip and XQ-FSX.ZIP.