massive refactoring to switch from camelCase to snake_case:

historically, Libervia (SàT before) was using camelCase as allowed by PEP8 when using a
pre-PEP8 code, to use the same coding style as in Twisted.

However, snake_case is more readable and it's better to follow PEP8 best practices, so it
has been decided to move on full snake_case. Because Libervia has a huge codebase, this
ended with a ugly mix of camelCase and snake_case.

To fix that, this patch does a big refactoring by renaming every function and method
(including bridge) that are not coming from Twisted or Wokkel, to use fully snake_case.

This is a massive change, and may result in some bugs.

sat/plugins/plugin_xep_0447.py

@@ -59,7 +59,7 @@ class XEP_0447:
     def __init__(self, host):
         self.host = host
         log.info(_("XEP-0447 (Stateless File Sharing) plugin initialization"))
-        host.registerNamespace("sfs", NS_SFS)
+        host.register_namespace("sfs", NS_SFS)
         self._sources_handlers = {}
         self._u = host.plugins["XEP-0103"]
         self._hints = host.plugins["XEP-0334"]
@@ -150,7 +150,7 @@ class XEP_0447:
         if self._http_upload is None:
             return False
         try:
-            await self._http_upload.getHTTPUploadEntity(client)
+            await self._http_upload.get_http_upload_entity(client)
         except exceptions.NotFound:
             return False
         else:
@@ -334,7 +334,7 @@ class XEP_0447:
                     "There should not be more that one attachment at this point"
                 )
             await self._attach.upload_files(client, data)
-            self._hints.addHintElements(data["xml"], [self._hints.HINT_STORE])
+            self._hints.add_hint_elements(data["xml"], [self._hints.HINT_STORE])
             for attachment in attachments:
                 try:
                     file_hash = (attachment["hash_algo"], attachment["hash"])