Implement 'everything' group behavior
precheck group and node settings
do not create groups or nodes by default
Have httpapi preserve original query in case the plugin modifies it for accurate API
explorer output
This change causes cfg change notifications to more accurately reflect atomic
expectactions. If multiple fields are changed on multiple nodes that a watcher may
have registered, they will now get that data in one chunk instead of many.
Add ability for code to add watchers on nodes and their attributes. This is likely to
be reworked internally to better aggregate requests, but the code interface
is potentially complete.
The pickling would get horrendously slow as total node count increased. This meant very long time to sync
to disk for just one change out of 65,000. This strategy changes things to more selective and only
do things for the dirty keys rather than everything. Large changes to small amounts of nodes will take
more time (because more calls to dump pickle), but small changes to a small subset of nodes will take much
less time.
There was an optimization to skip examination of groups if it was determined
that the group membership had not changed. However, this erroneously
masked the examination in the case of reordered groups. Skip the
optimization to cover that case at the expense of at least some needless churn.
This only happens when something goes to change group membership in some way, so
this shouldn't be too expensive.
Now when expressions can not be completed, the reason is presented as 'broken'.
Additionally, when unsetting a value that would affect expressions,
perform appropriate changes.
For one, prevent unknown attributes from getting into configmanager from now on.
Additionally, have the attributes plugin manage to convey bad attributes when
encountered.
When doing a set, check the keynames and value types as
appropriate. raise ValueError in the configmanager case
since it could be code or human mistake. attributes plugin
then catches this error and propogates it up as an InvalidArgumentException
if it is just trying to pass in data from user.
