Replaces Master-Slave with Client-Server

Expunging all occurrences of inappropriate language of the query and
response paradigm of PLC communications. We are familiar with the Modbus
terminology and fully support this change.
https://www.modbus.org/docs/Client-ServerPR-07-2020-final.docx.pdf

docs/conf.py

@@ -2,7 +2,6 @@
 # Configuration file for the Sphinx documentation builder.
 #
 # For the full list of built-in configuration values, see the documentation:
-# https://www.sphinx-doc.org/en/master/usage/configuration.html
 
 import os
 import sys
@@ -11,7 +10,6 @@ sys.path.insert(0, os.path.abspath('../src'))
 from revpimodio2 import __version__
 
 # -- Project information -----------------------------------------------------
-# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
 project = 'revpimodio2'
 copyright = '2023, Sven Sager'
@@ -19,7 +17,6 @@ author = 'Sven Sager'
 version = __version__
 
 # -- General configuration ---------------------------------------------------
-# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
 extensions = [
     'sphinx.ext.autodoc',
@@ -31,7 +28,6 @@ templates_path = ['_templates']
 exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
 
 # -- Options for HTML output -------------------------------------------------
-# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
 html_theme = 'alabaster'
 html_static_path = ['_static']