It can be used with an external method by providing the URL to proxy as a query parameter:
ERP5Site_getHTTPResource?url=URL

The query is synchronous (no portal_activities), so, the Zope thread will be blocked until the external request is other.
In order to prevent consuming all threads, there is a really aggressive timeout of 1 second only.
This is enough for a RSS reader.
If the timeout is to short, do not increase it, but change the proxy design to use portal_activities instead.

For now, only authenticated user can use it (to prevent becoming an open proxy).
Only GET query are allowed (until a use case required any other HTTP method).

Instead of using obsolete processing_node parameter, use invalid_onlym
with True, in order to check if there are activities with error.

As INVOKE_ERROR_STATE is needed only in SQLBase, move it there and so drop it
from ActiveObject and ActiveProcess.

Thanks to using invalid_only the caller can check if there is any
invalid activity on the context.

This might be used by hasErrorActivity in ActiveObject and
ActiveProcess.

hasErrorActivity is tested on ActiveObject and ActiveProcess classes.

DISTRIBUTABLE_STATE was removed bad50097

Writing SQL belongs to catalog.

Improvement: As proposed by Jean-Paul when this extension was added (2010),
allows mixing left- and inner-join lookups.
Improvement: Now it is not required to specify tested_base_category_list
to enable inner joins: they will automatically be used whenever a base
category set on context matches the preference. If all categories set on
context match the preference, then no left join will be used at all.

This only makes a difference when "test=False" is given, which is a hack
anyway.

The main purpose is to stop calling buildSQLSelector so it can be removed.
Remove Base_zSearchRelatedObjectsByCategoryList.
Also, discard a superfluous comment in testArchive which references the
discarded ZSQLMethod, for consistency.
Fixes an existing failure in testArchive.

Less ambiguous than previous syntax while keeping names short.
Allows defining more flags without limiting base_category namespace: the
only forbidden base_category id is "related", which was already reserved
(ie, not working) in previous syntax.

These improvements include :
   * better address reporting
   * better handling of Social Security Number and Temporary Technical Number
     for foreign employees
   * add more checks and UI error messages to report wrong values to the user
     before he submits the DSN
   * fix bugs for some edge cases

When aggregating Paysheets using a dialog, we don't want to aggregate deleted ones.

* Only process Expense records with a date set (avoid processing records with no data)
* Add garbage collect on empty draft records
* Change jIO configuration to resolve conflict with remote as the reference
* Comment indexxedDB patch XXX code should be added for Safari to use websqlstorage

// XXX Please note this is a work-around to have a usable application
// waiting for a bug in IndexedDB or jIO to be fixed
// this bug can been seen on 'fast' devices where
// data stored in settings is not accessible right after save.
// it was shown that after redirecting to sync page, the
// "sync_reload" value got in the sync gadget was "undefined"
// Hence triggering synchronization and not setting the storage first
// and redirecting once again on the jio configuration page

Revert "[erp5_ui_test] Be always explicit (with sorting) and bugfix fr argumentto FooModule_createObjects

This reverts commit 1bb79a39

/reviewed-on !332

/reviewed-on !329