The delete-flag allows adding records that begin with 0xFF and have a length less than 9 bytes (5 bytes for non-huge files).
This modification introduces support for an internal record delete flag for FairCom RTG files created with the <ctfixed> option enabled. The delete-flag support allows a record beginning with 0xFF to be inserted in a ctFIXED file (a c-tree error 553 was returned before this change).
It also allows creating a ctFIXED huge file with less than a 9-byte record length or a ctFIXED non-huge file with less than a 5-byte record length (a c-tree error 21 was returned before this change).