Return search results into channel

[vetinari]

Currently all search results are returned when the call has finished, even for paged queries which can be quite huge results. Sending the results to a channel can be a great improvement in such cases where we can process the chunks right after they're received and do not have to wait for the last page to arrive.

Other search calls like a persistent Search or LDAP Sync will also benefit - these never end and need something to pass their results.

[kayrus]

+1 for persistent search