OBS: You'll need to resync/rebuild your database!

- This implements an updated, clearer and more robust access system. The policy is now to lock that which is not explicitly left open.
- Permission strings -> Lock strings. Separating permissions and locks makes more sense security-wise
- No more permissiongroup table; permissions instead use a simple tuple PERMISSIONS_HIERARCHY to define an access hierarchy
- Cleaner lock-definition syntax, all based on function calls.
- New objects/players/channels get a default security policy during creation (set through typeclass)

As part of rebuilding and testing the new lock/permission system I got into testing and debugging several other systems, fixing some
outstanding issues:
- @reload now fully updates the database asynchronously. No need to reboot server when changing cmdsets
- Dozens of new test suites added for about 30 commands so far
- Help for channels made more clever and informative.

src/comms/managers.py

@@ -56,7 +56,7 @@ class MsgManager(models.Manager):
         try:
             idnum = int(idnum)
             return self.get(id=id)
-        except:
+        except Exception:
             return None
         
     def get_messages_by_sender(self, player):
@@ -259,7 +259,10 @@ class ChannelManager(models.Manager):
             pass
         if not channels:
             # no id match. Search on the key.
-            channels = self.filter(db_key=ostring)
+            channels = self.filter(db_key__iexact=ostring)
+        if not channels:
+            # still no match. Search by alias.
+            channels = [channel for channel in self.all() if ostring.lower in [a.lower for a in channel.aliases]]
         return channels 
 
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