This batch of changes includes:
- Support for FIRST/SKIP clauses
- Support for CURRENT_CONNECTION, CURRENT_ROLE, CURRENT_TRANSACTION and CURRENT_USER context variables
- Changed the BLR generated for RM/Cobol programs to use blr_cstring
rather than blr_text so that CHAR and VARCHAR fields are not written
as "fixed length" fields from Cobol programs. Incoming CHAR and
VARCHAR fields are right filled with spaces inbound to the Cobol
program and stripped of trailing spaces outbound.