This solves the following issues:
1) Outrageous memory consumption when blobs are converted from strings during request processing
2) Materialization doesn't cause invalidation of BLOB IDs too early.
Original behaviour caused errors with updatable views or procedures receiving BLOB arguments.
-Replace codes.h with iberror.h (or remove)
-Move gds__vax_integer and gds__event_block* to alt.cpp and isc_ to gds.cpp
-Use ISC_QUAD internally
-Use isc_vax_integer internally
placed some variables in context
fixed some function signatures
closed a few possible buffer overruns
sorry to the platform maintainers, I can't verify what I did for non-Win32 builds
1. Bring trace DSQL, DYN and BLR trace logging up-to-date
2. Remove redundant CSB pointer dereferences in BLR parser and request compiler
3. Convert RIGHT JOIN to LEFT JOIN early during BLR parsing
4. Check BLR syntax for unititalized contexts usage
5. Some type-safety and const-correctness fixes
2. Rework temporary files management. In particular:
- fix security hole on all POSIX platforms except FREEBSD/OPENBSD related to mktemp usage (possible DoS attacks or privileges elevation) via switching to mkstemp
- fix problem with only 27 unique filenames generated on Win32 (which could cause unpredictable behavior in SS builds)
- pass appropriate flags to CreateFile on Win32 to indicate that files are temporary (this may improve performance a little)
