dbi-link - dbi-link: * Added dbi_link_init() function which should be

Log Message:
-----------
* Added dbi_link_init() function which should be fairly performant.

* dbi_link now uses the %_SHARED hash for common code including database
handles.

* Refactored all remote-calling code to use $_SHARED{remote_exec_dbh}

* Added new SQL-callable method remote_exec() which executes on the
remote side but does not return rows.

* Added new facilities for examining, setting and clearing %_SHARED.

* Debugging is now part of the %_SHARED hash.

* Refactored the setting of pg_settings to an UPDATE.

* Added version_integer() function. Thanks to Andrew of Supernews for
this. I'll be using it to turn on/off features Real Soon Now.

* Added checks in PL/PerlU for YAML and DATA_SOURCE.

* As a consequence of the above, the dangerous, scary string eval is
gone. o/` Ding, dong, the string eval is dead o/`

* dbi_connection now has an environment YAML. Might want to fill this
in when I get some idea of what people might want in their
environments.

* Because it uses spi_prepare, DBI-Link now requires PostgreSQL 8.2 (or
better ;)

* Added tests for mysql connectivity.

Modified Files:
--------------
dbi-link:
README.txt (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/README.txt.diff?r1=1.6&r2=1.7)
dbi_link.sql (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/dbi_link.sql.diff?r1=1.3&r2=1.4)
dbi-link/test:
pg.sql (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/test/pg.sql.diff?r1=1.1&r2=1.2)

Added Files:
-----------
dbi-link:
dump_shared.sql (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/dump_shared.sql?rev=1.1&content-type=text/x-cvsweb-markup)
scrub_shared.sql (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/scrub_shared.sql?rev=1.1&content-type=text/x-cvsweb-markup)
set_shared.sql (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/set_shared.sql?rev=1.1&content-type=text/x-cvsweb-markup)
dbi-link/test:
mysql.sql (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/test/mysql.sql?rev=1.1&content-type=text/x-cvsweb-markup)
mysql.t (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/test/mysql.t?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
dbi-link:
make_connection.sql
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/make_connection.sql)
remote_query.sql
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/remote_query.sql)