Deprecate flask-webservice related functionality

- affects modules: httprequests, fflask, resources
- probably in version v0.24.0.0
- related to #53

Changelog.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - The versioning scheme now adheres to '0.major.minor.patch' to correctly indicate impacts of new releases. (#54)
 - The 'communication' module is renamed to 'clients'.
 ### Deprecated
+- Flask-webservice related functionality will be moved to a dedicated plugin. (#53)
 ### Removed
 - communication.module() and httprequests/localserver.proxy() functions.
 ### Fixed

README.md

@@ -42,6 +42,8 @@ The user request invoked from the CLI is passed to the backend which opens the a
 
 ### Client-server mode
 
+>  Flask-webservice related functionality will be moved to a dedicated plugin, see #53.
+
 To run `financeager` as client-server application, start the flask webservice by
 
  export FLASK_APP=financeager/fflask.py

financeager/clients.py

@@ -6,6 +6,8 @@
 from . import httprequests, localserver, offline, plugin
 from .exceptions import InvalidRequest, CommunicationError, OfflineRecoveryError
 
+logger = financeager.init_logger(__name__)
+
 
 def create(*, configuration, sinks, plugins):
  """Factory to create the Client subclass suitable to the given
@@ -88,6 +90,11 @@ def __init__(self, *, configuration, sinks):
 
  financeager.init_logger("urllib3")
 
+ logger.warning(
+ "Flask-webservice related functionality will be moved to a "
+ "dedicated plugin.\n"
+ "Check the Changelog when updating your financeager version.")
+
  def safely_run(self, command, **params):
  """Execute base functionality.
  If successful, attempt to recover offline backup. Otherwise store