[GEOS-3387] Metadata links should be included in the WFS capabilites document as well
[GEOS-5840] Changing the default style of a layer won't cause truncation of the tile caches for layer groups containing the layer, and, [GEOS-4760] Make GWC tile layers use the GeoServer layer's http caching settings
[GEOS-5818] WMS 1.3 cascading broken after GEOT-4283 changes
Complete Java port of CSS extension code
GEOS-5760 Documentation not referrencing Xms correctly
GEOS-5844 fix nulls in SecureCatalog.list

a catalog filter can potentially result in nulls being in the
returned iterator. an example is a LocalWorkspaceCatalogFilter
when a WMS virtual service getcaps request occurs.
[GEOS-5800] GeoServer won't parse relative external graphic locations in SE 1.1 styles
Merge pull request #248 from ischneider/GEOS-5844-2.3.x

GEOS-5844 2.3.x
GEOS-5820 Disabling security does not work as expected
GEOS-5852 default filter chain does not create HTTP session even with session creation enabled
Security documentation enhancments
GEOS-5862 - GSUSER variable not available in REST requests
[GEOS-5370] WPS requests fail when performed on a secured layer
Fixing build
GEOS-5863 Add support for white space margin in graphic fills
Fixing the broken build (GEOS-5820)
GEOS-5826 backport to 2.3.x
Merge pull request #258 from mbarto/geos_5826_23x

GEOS-5826 backport to 2.3.x
Move CSS module to extensions
Refactor docs/sources to reflect css change to extension status