Clarify error message to be more helpful

modules/chankeep.py

@@ -41,7 +41,7 @@ def emptyChanAllocate(net, flist, relay, new):
     allocated = {}
     toalloc = len(flist)
     if toalloc > sum(chanfree[0].values()):
-        error("Too many channels to allocate for %s - this is probably a bug" % net)
+        error("Too many channels to allocate for %s - channels joined since initial query, wait a while" % net)
         return False
     for i in chanfree[0].keys():
         for x in range(chanfree[0][i]):