As part of webapp#8815 we want to retrieve multiple types of
keys through nickserver. This requires the new couchdb view
on Identities this commit provides.

The webapp and platform version of couchdb design docs need to
be in sync. Therefore this mr should be merged at the same time
as webapp!61 .

webapp#8806 needs couch design docs that allow invite codes
to be sorted by date. This updated needs to be deployed in sync
with the new webapp version.

Soledad is now taking care of the design of said database.
Closes #8428

- Resolves: #8693

When the soledad couch user is not present, soledad-server
refuses to start, so we need to ensure that couch is setup correctly
before starting soledad-server.

see https://leap.se/code/issues/8535

Mochiweb in couchdb by default sets the TCP socket option SO_NODELAY to
false. This means that small data sent to the TCP socket, like the reply
to a document write request (or reading a very small document), will not
be sent immediately to the network - TCP will buffer it for a while
hoping that it will be asked to send more data through the same socket
and then send all the data at once for increased performance.

Setting this increases the couchdb speed significantly.

Change-Id: Ib493ef061ff62c9bdee501e44ce2b55990fe14b7

Latest shorewall module does `shorewall check` (executed
by `Exec[shorewall_check]`) so every related resource change
must notify this Exec instead of `Service[shorewall]` as before.