Add support for SQL3 IS TRUE and IS FALSE.
Augment support for SQL92 SET TIME ZONE...

Remove unused ScanString variable and code.

#define StrNCpy(dst,src,len)    \
	(strncpy((dst),(src),(len)),(len > 0) ? *((dst)+(len)-1)='\0' : \
	NULL,(void)(dst))
	     ^^^^^^ - to avoid "value computed is not used" from gcc
	in ma-a-any places (should to fix thouse places instead, but ...
	time)

config.h.in:
/*
 * TBL_FREE_CMD_MEMORY: free memory allocated for an user query inside
 * transaction block after this query is done.
 */
#define TBL_FREE_CMD_MEMORY
- this is default now.

(Thanks to Bruce for finding what caused problem).

 rather than assuming FALSE).

 CURRENT_USER.
Add syntax for primary and foreign keys.
Change optional syntax in CREATE INDEX to avoid parsing conflict with
 TIMESTAMP WITH TIME ZONE data type (use USING <class> rather than WITH...).
Decouple various categories of data type syntax to allow the most possible
 non-ambiguous extensions to SQL92 for column names and labels. This should
 make the parser a bit more understandable, or at least easier to find
 where and how the data types are handled.
Support syntax for IN and EXISTS clauses with subselects.
Support SQL92 syntax for IS TRUE/IS FALSE/IS NOT TRUE/IS NOT FALSE.

Add keywords for national character types.
Shorted date/time keyword token names for convenience.
Add SQL3 reserved words TRUE and FALSE.

Change a few routine names to ensure <= 16 characters in name
 to fit correctly into pg_proc.

 from "action" to "ev_action".

 to "ev_action".

to changes in parser.

Shorten a few routine names to <= 16 characters long to fit in table.