[server] Make connection pooler configurable and set better default values
Drop the configuration connections-pool-size and add new configurations options:
* connections-pool-min-size. Set to 0 by default so we open connections only
when needed. This avoid opening min-size*processes connections at startup,
which is, it think, a good default.
* connections-pool-max-size. Set to 0 (unlimited) by default, so we move the
bottleneck to postgresql.
* connections-idle-timeout. Set to 10 minutes. I don't have arguments about
this except that this is the default in pgbouncer.
Base views
----------
|cubicweb| provides a lot of standard views, that can be found in
:mod:`cubicweb.web.views` sub-modules.
A certain number of views are used to build the web interface, which apply to one
or more entities. As other appobjects, their identifier is what distinguish them
from each others. The most generic ones, found in
:mod:`cubicweb.web.views.baseviews`, are described below.
You'll probably want to customize one or more of the described views which are
default, generic, implementations.
.. automodule:: cubicweb.web.views.baseviews
You will also find modules providing some specific services:
.. automodule:: cubicweb.web.views.navigation