fix: add lists param for load_entry_points() function

wuttasync needs to let various projects define import/export handlers
using the same key, so it needs a way to discover them all without
this logic auto-discarding duplicate keys

docs/conf.py

@@ -42,6 +42,7 @@ intersphinx_mapping = {
     "rattail": ("https://docs.wuttaproject.org/rattail/", None),
     "rattail-manual": ("https://docs.wuttaproject.org/rattail-manual/", None),
     "rich": ("https://rich.readthedocs.io/en/latest/", None),
+    "setuptools": ("https://setuptools.pypa.io/en/latest/", None),
     "sqlalchemy": ("http://docs.sqlalchemy.org/en/latest/", None),
     "wutta-continuum": ("https://docs.wuttaproject.org/wutta-continuum/", None),
     "wuttasync": ("https://docs.wuttaproject.org/wuttasync/", None),

docs/glossary.rst

@@ -222,13 +222,9 @@ Glossary
    entry point
      This refers to a "setuptools-style" entry point specifically,
      which is a mechanism used to register "plugins" and the like.
-     This lets the app / config discover features dynamically.  Most
-     notably used to register :term:`commands<command>` and
-     :term:`subcommands<subcommand>`.
+     This lets the app / config discover features dynamically.
 
-     For more info see the `Python Packaging User Guide`_.
-
-     .. _Python Packaging User Guide: https://packaging.python.org/en/latest/specifications/entry-points/
+     For more info see :doc:`setuptools:userguide/entry_point` in the setuptools docs.
 
    handler
      Similar to a "plugin" concept but only *one* handler may be used