Cleanup for vacuum help, manual page, and error message

This again fixes the problem
with the default permissions for PUBLIC and the preventing of
statements like "GRANT null on test to test_user;".

I've patched pg_dump.c and createdb to add support for password
authentication, using the '-u' switch as in psql. I have updated also the
man pages.

Hi -- a couple of small items concerning the January 23rd snapshot:
the inclusion of the Kerberos stuff in one Makefile, a "leading tab"
cleanup in another, and a fix for a typo in the configure script.

This is a patch to fix crashes in psql when executing queries from
an external file. The code also adds error checking to verify that
memory for "query" was allocated. The conditional for the block of
code was changed from "query == NULL" to "query_alloced == false".

The conditional, "query == NULL", was never true. This prevented
the memory being allocated for "query". A few lines later, an attempt
to write to an un-allocated memory area generated a SIGSEGV causing
the frontend to crash.

psql .psqlrc file startup(Andrew)

Also, I think the existence of pgsql/src/bin/initlocation/initlocation
isn't necessary as it's generated by Makefile from initlocation.sh.

with supporting code.

Creates SubLink node in gram.y.

psql.c patch for newatttypmod field.

varchar length.

Cleans up code so attlen is always length.

Removed varchar() hack added earlier.

Will fix bug in selecting varchar() fields, and varchar() can be
variable length.

tests running "as expected"...

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

  o  A new patch that contains the following changes:
        -- The pg_pwd file is now cached in the postmaster's memory.
        -- pg_pwd is reloaded when the postmaster detects a flag file creat()'ed
           by a backend.
        -- qsort() is used to sort loaded password entries, and bsearch() is
           is used to find entries in the pg_pwd cache.
        -- backends now copy the pg_user relation to pg_pwd.pid, and then
           rename the temp file to be pg_pwd.
        -- The delimiter for pg_pwd has been changed to a tab character.

	...malloc/free -> palloc/pfree
	...fopen/fclose -> AllocateFile/FreeFile

src. It is in the function ParseACL. When I find that I
can not allocate enough memory for the ACL structure I
return an NULL instead of doing an exit_nicely(g_conn);

From: Matthew C Aycock <maycock@scuba.pcpipeline.com>

Clean up formatting of code

Integrate new functions into dumpTable


This is not tested yet...have to recompile server due to patches from
Todd...but this compiles cleanly as it stands now

An extension to the code to allow for a pg_password authentication database
that is *seperate* from the system password file