core (memory/cache): common cache:

host has now a common_cache attribute for data which can be shared between profiles. client.cache is for private data

src/core/xmpp.py

@@ -523,7 +523,7 @@ class SatXMPPClient(SatXMPPEntity, wokkel_client.XMPPClient):
         # but we restrict to domish.Element to make trigger treatments easier
         assert isinstance(obj, domish.Element)
         # XXX: this trigger is the last one before sending stanza on wire
-        #      is it is intended for things like end 2 end encryption.
+        #      it is intended for things like end 2 end encryption.
         #      *DO NOT* cancel (i.e. return False) without very good reason
         #      (out of band transmission for instance).
         #      e2e should have a priority of 0 here, and out of band transmission