Uses TZ environment variable.
 Needs additional schemes for brain-dead SQL92 time offsets.

 for mixed-case and surrounding with double quotes.

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.