Allow varchar() to only store needed bytes.  Remove PALLOC,PALLOCTYPE,PFREE.  Clean up use of VARDATA.

Should fix an AIX compiler problem

Change some labels in bootparse to make ctags happy.  Clean up outfunc/readfunc code and add missing fields for Query structure and new Union fields.  Fix optimizer bug shown in new \do command.  Change WARN to ERROR in contrib and regression stuff.

From: Tom I Helbekkmo <tih@Hamartun.Priv.NO>

need to include string.h for strdup()

From: Bryan Henderson <bryanh@giraffe-data.com>

Comment-out dynamic link function declarations since they are all
 provided by the system.
Should we bother continuing to support non-elf Linux systems??

Change declarations from "struct varlena *" to "text *".
Remove register variables since compiler should do better on its own.

Change NOTICE/NOTICE/NOTICE/WARN elog messages to a single message
 with a few newline/tab breaks embedded in the string. Much cleaner I hope.

 closer to standard behavior.
Substitute "text *" for "struct varlena *" in declarations.

 sigsetjmp as a macro, so gives compiler warning without bracketing.