Log Message:
Update to 0.44.  Because guile-pg now works with mainstream guile,
switch from guile16 to guile (currently 1.8), and remove the special
accomodations for 1.6.

- 0.44 | 2012-04-20

  - distribution now .tar.xz

	If you have GNU tar, you can use "tar xf" and it will DTRT.
	If not, you can use "xz -dc TARBALL | tar xf -" to unpack.

  - bugfix: ‘pg-get-copy-data’ handles unspecified ‘async?’

	Previously, if ‘async?’ was unspecified, it was incorrectly
	interpreted as true (i.e., "not false").  Now, if unspecified,
	it is interpreted correctly as false.

  - testing slack for pre-8.1 ‘pg-client-encoding’

	Previously, the types-table test was too strict when checking
	the ‘pg-client-encoding’ return value, expecting "UTF-8" only.
	Now, it accepts also "UNICODE", which is the norm for PostgreSQL
	prior to 8.1.

  - support for ‘make check KEEPD=1’

	If you run "make check" many times, you can avoid daemon bounce
	overhead by specifying ‘KEEPD=1’, which inhibits daemon killing.

  - maintenance tools
    - GNU Autoconf 2.68
    - GNU Automake 1.11.5
    - GNU Libtool 2.4.2
    - Guile-BAUX 20120309.1509.1c4bb92
    - SNUGGLE 0.1

- 0.43 | 2012-02-06

	[PBI] means "WARNING: potentially backward-incompatible".

  - bugfix: ‘sql-quote’ translates backslash (#\\) to ‘\134’

	Previously, backslash characters were passed through
	unmodified.  Now, they are translated to the string "\134"
	(i.e., the four characters ‘#\\’, ‘#\1’, ‘#\3’, \ 
‘#\4’).

  - [PBI] ‘bytea’ stringifier outputs only one backslash

	If the ‘bytea’ stringifier from ‘(database postgres-types)’ is
	used standalone, this represents a BACKWARD INCOMPATIBLE change.
	In the normal case, however, where the stringifier is used in
	conjunction with ‘sql-quote’, this change is transparent.

  - new (database postgres-qcons) proc: string-xrep

	Some versions of Guile emit ‘\xXX’ to represent the octet with
	hex value XX when constructing the external representation of a
	string, for certain octets.  Furthermore, some versions of
	PostgreSQL cannot grok such escape sequences anyway.  The new
	procedure ‘string-xrep’ is like ‘object->string’ (for a \ 
string
	arg) except that it explicitly emits the octet itself, except
	for ‘#\\’ and and ‘#\"’, which are backslash-escaped \ 
as normal.

  - ‘(database postgres-qcons) idquote’ no longer emits ‘\xXX’

	Before, ‘idquote’ used ‘object->string’ internally, and thus
	suffered from the problems described in the preceding NEWS
	entry.  Now, it uses ‘string-xrep’.

  - ‘(database postgres-col-defs) validate-def’ more permissive

	A column name may now be any symbol that does not contain
	whitespace.  Previously it was restricted to a symbol whose
	constituent characters were alphanumeric or underscore.

	This change makes Guile-PG less strict (in some sense) than
	PostgreSQL, which imposes other rules.  Overarching is the
	recommendation from PostgreSQL to consistently use a "delimited
	identifier" (aka "quoted identifier") rather than a naked name.
	That's what ‘idquote’ and ‘string-xrep’, both used extensively
	in Guile-PG, do.  See section "Identifiers and Key Words" in
	chapter "SQL Syntax" in the PostgreSQL documentation, for more
	information.

  - ‘pgtable-manager’ and ‘pgtable-worker’ likewise relaxed

	These use ‘(database postgres-col-defs)’ procs and new proc
	‘string-xrep’ internally, and thus benefit from the changes
	mentioned in the preceding NEWS entries.  Notably, table and
	column names are less constrained.  For example, see file
	test/types-table.scm, proc ‘test-m2’.

	[Probably "relaxed" is not as good as "strictness relaxed and
	multi-byte-fu enhanced", but that does not fit on one line.]

  - fake cluster created on-demand for "make check"

	In addition to a fake installation, "make check" now also
	creates a cluster under test/fake-cluster/ configured for
	Unix-domain connections, and kicks/kills the daemon around the
	actual ‘runtest TEST’ invocations.  This means it is no longer
	necessary to set env var ‘PGDATABASE’.  In fact, that and env
	var ‘PGHOST’ are now silently ignored, since ‘runtest’ clobbers
	them internally.

	If you previously tested Guile-PG against different PostgreSQL
	versions by varying ‘PGDATABASE’, you now need to vary env var
	‘INITDB’ instead, and zonk the cluster before the "make check"
	invocation.  Something like:

	  $(MAKE) delete-cluster
	  $(MAKE) check DEBUG=1 INITDB=/a/particular/initdb

	in directory test/ would be fine.  See README section "Testing".

- 0.42 | 2011-10-04

  - bugfix: "make check" no longer clobbers installed file

	For Guile versions that require a Scheme wrapper for .so loading
	(i.e., Guile 1.8 and later), "make check" does a fake install w/
	a ‘prefix’ in the build tree.  Unfortunately, in Guile-PG 0.41,
	that dir was not specified to the Scheme wrapper, resulting in
	its installation under the "real" (as determined / set by the
	configure script) ‘prefix’.

	The system would reamin in this inconsistent state, with the
	wrapper pointing into the build tree, until "make install", at
	which point everything was resynchronized.  Obviously, if you
	never do "make install", the problem persists (silently, until
	the build tree is deleted).

	This has now been fixed.  If you did a "make check" but NOT
	"make install" of Guile-PG 0.41, the best way forward is to
	configure Guile-PG 0.42 and then "make install; make uninstall".

  - ‘pg-print’ now does ‘fflush’ after each operation

	This probably kills performance, but it is safer, given Guile's
	direct use of ‘write(2)’ et al.

  - ‘pg-set-client-encoding!’ also accepts symbolic encoding

- 0.41 | 2011-09-29

  - Bugs fixed

    - Make ‘idquote’ special-case ‘*’ in second part.

	was: (display (idquote 'a.*)) |= "a"."*"
	now: (display (idquote 'a.*)) |= "a".*

    - Call ‘string-append’ with strings, not symbols.

	We no longer rely on this particular Guile 1.4 slack.

  - Portability fixes (tested w/ Guile 1.8.7)

	With the following (and other, non-user-visible) changes, "make
	check" no longer displays "foo is deprecated" messages with
	Guile 1.8.7.  If you see them for your system, for either "make
	check" or subsequent Guile-PG use, please report that as a bug.

    - Don't do "defer/allow ints" for Guile 1.8+.

    - Revamped Scheme object to C byte range for Guile 1.8+

	Access to Scheme string representation was curtailed in Guile
	1.8 (API available but deprecated), so all operations that pass
	a C byte range to libpq functions now incur an extra conversion
	step.  The unfortunate user-visible result is performance loss.

  - Planned retirement
    - procedure ‘(database postgres) pg-getline’
    - procedure ‘(database postgres) pg-getlineasync’

	These procedures are obsoleted by ‘pg-get-copy-data’ and
	WILL BE REMOVED by 2012-12-31.

  - New fluid to control ‘(database postgres-qcons) sql-quote’

	The fluid ‘sql-quote-auto-E?’ controls whether or not
	‘sql-quote’ should check for ‘\’ (backslash) characters and
	prefix an "E" in that case.  This is relevant if you use
	PostgreSQL 8.2+.

  - New support for "hex format" in ‘bytea’ objectifier

	PostgreSQL 9.0 introduces a more efficient "hex format" for
	‘bytea’ output.  This is now recognized and parsed, falling back
	to handling the traditional "escape format" if not recognized.

  - Doc improvements
    - Fix omission: Document ‘pg-get-copy-data’ arg ‘async?’.
    - Indices merged into one
    - Builtin type converters listed and indexed
    - Builtin type converter array variants listed

  - For ‘make check DEBUG=1’, display the guile(1) invocation.

  - Tested w/ latest server versions: 8.[01234], 9.[01]

	Additionally, the entries in file test/OK now include the
	associated Guile-PG version, and some include a subheading
	"other pg" to list the precise server version numbers.

- 0.40 | 2011-06-05
  - Changes to configuration
    - Bug fixed in finding ‘pg_encoding_to_char’, \ 
‘pg_char_to_encoding’
    - Now seeks and arranges to use <postgresql/foo> headers
    - No longer clobbers user vars ‘CPPFLAGS’, ‘LDFLAGS’
  - Changes to build / test / install
    - Bug fixed: Delete everything on "make uninstall"
    - Scheme code now punified for install
    - Add "no C module" mode for build / install
    - Changes to "make check"
      - Flaky symlinking replaced w/ partial in-tree installation
      - runtest now honors env var ‘GUILE’
      - runtest now shows loaded files if env var ‘DEBUG’ set
  - New (database postgres-qcons) proc: idquote
  - Docs now explicitly UTF-8
  - Tested on more platforms (see file test/OK)
  - Maintenance uses AAL 2.68, 1.11.1, 2.4; Guile-BAUX 20110605.1656