pgtcl - libpgtcl: * Added new command, pg_set_single_row_mode aka

Log Message:
-----------
* Added new command, pg_set_single_row_mode aka ::pg::set_single_row_mode
to enable retrieving query results row-by-row.

* Add subcommands for direct execution of connection handles for
conndefaults, set_single_row_mode, is_busy, blocking and
cancel_request.

* Make "make distclean" get rid of more autoconf work product.

* Update README.freebsd.

Modified Files:
--------------
libpgtcl:
ChangeLog (r1.68 -> r1.69)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/ChangeLog?r1=1.68&r2=1.69)
Makefile.in (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/Makefile.in?r1=1.12&r2=1.13)
README.freebsd (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/README.freebsd?r1=1.4&r2=1.5)
configure (r1.20 -> r1.21)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/configure?r1=1.20&r2=1.21)
configure.in (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/configure.in?r1=1.18&r2=1.19)
libpgtcl/generic:
pgtcl.c (r1.32 -> r1.33)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtcl.c?r1=1.32&r2=1.33)
pgtclCmds.c (r1.88 -> r1.89)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclCmds.c?r1=1.88&r2=1.89)
pgtclCmds.h (r1.26 -> r1.27)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclCmds.h?r1=1.26&r2=1.27)
pgtclId.c (r1.48 -> r1.49)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclId.c?r1=1.48&r2=1.49)