pgtcl - libpgtcl: * Add support for the lo_truncate function that

Log Message:
-----------
* Add support for the lo_truncate function that truncates a large object
to a given length.

* Version bump to 1.7.

* Update autoconf build to Tcl Extension Architecture (TEA) 3.6

* Add new command, pg_quote_ex, which takes a connection handle
and a string to quote. If the string matches the null string,
returns NULL. If not, returns the string quoted for inclusion
in SQL commands.

* pg_quote_ex can be invoked as a method of the connection handle
as well. For instance, "$db quote $string".

* Removed unused variables and silence compiler warnings with casting.

* Added "internal_position" and "internal_query" to the error options.

Modified Files:
--------------
libpgtcl:
ChangeLog (r1.52 -> r1.53)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/ChangeLog.diff?r1=1.52&r2=1.53)
Makefile.in (r1.11 -> r1.12)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/Makefile.in.diff?r1=1.11&r2=1.12)
README.freebsd (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/README.freebsd.diff?r1=1.3&r2=1.4)
aclocal.m4 (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/aclocal.m4.diff?r1=1.5&r2=1.6)
configure (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/configure.diff?r1=1.15&r2=1.16)
configure.in (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/configure.in.diff?r1=1.14&r2=1.15)
pkgIndex.tcl.in (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/pkgIndex.tcl.in.diff?r1=1.1&r2=1.2)
libpgtcl/doc:
README (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/doc/README.diff?r1=1.4&r2=1.5)
libpgtcl.sgml (r1.21 -> r1.22)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/doc/libpgtcl.sgml.diff?r1=1.21&r2=1.22)
libpgtcl/generic:
pgtcl.c (r1.30 -> r1.31)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtcl.c.diff?r1=1.30&r2=1.31)
pgtclAppInit.c (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclAppInit.c.diff?r1=1.1&r2=1.2)
pgtclCmds.c (r1.70 -> r1.71)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclCmds.c.diff?r1=1.70&r2=1.71)
pgtclCmds.h (r1.21 -> r1.22)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclCmds.h.diff?r1=1.21&r2=1.22)
pgtclId.c (r1.44 -> r1.45)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclId.c.diff?r1=1.44&r2=1.45)
libpgtcl/tclconfig:
ChangeLog (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/tclconfig/ChangeLog.diff?r1=1.3&r2=1.4)
tcl.m4 (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/tclconfig/tcl.m4.diff?r1=1.6&r2=1.7)