08-06-06 sync with vcodex kpv update

06-05-09 don't add .qz to non-regular file paths

06-04-28 use input suffix on output if it doesn't already have one

05-11-09 fix mixed input compression logic

05-08-23 use sfdcvcodex() instead of vcsfio()

delay RS_WRITE_FILE until first encoded input if possible

05-06-30 first release