doc: Update external PL list

Peter Eisentraut <peter_e@gmx.net>

Commit: 2440c442d167d9d081a3e69c4fa78f3b6f8932e9
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2017-06-13T02:34:04Z
Releases: 10.0
doc: Update external PL list

Add PL/Lua, PL/v8.

Remove stale/unmaintained PL/PHP, PL/Py, PL/Ruby, PL/Scheme.

Reported-by: Adam Sah <asah@midgard.net>

Files

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doc/src/sgml/external-projects.sgml modified +10 −22

Documentation touched