Add non-working code which is commented-out to copy GroupClause structures.

 and from SELECT ... INTO ... support code.
Allow NOT, IS NULL, IS NOT NULL in constraints.
Define unionall boolean flag in SubSelect structure.
Implement row descriptors: (a, b, c) = (x, y, z).
Change IS TRUE, IS FALSE, etc. to expressions using "=" rather than
 function calls to istrue() or isfalse() to allow optimization.
Force type for TRUE and FALSE to bool.

Add a few lines of test code playing with the unique flag for unions.
 Does not do much helpful yet.

 is legal. Fix a little whitespace in other declarations.

 names over 16 characters. datet_datetime() -> datetime_datetime(), etc.

some of the ports...

Just got rid of PORTNAME altogether for FreeBSD and AIX...more to follow

will then get link'd into SUBSYS.o

config.h, right beside their appropriate HAVE_ #ifdefs...one central
location that is included everywhere...

tests under sparc_solaris