fixes #13115
(cherry-picked from 1dfec33)

The crashes would happen after some time when browsing the map,
especially when size of SVGs is in map units. This was due to wrong
removal of deleted cache entries where cache entry key would be
different from SVG file's path, thus not removing the entry that
got deleted. Now explicitly keeping the lookup key in the entry
to make sure this does not happen.

Related issues: #9959, #8883

(cherry picked from commit febadfe)

(cherry-picked from 27ee8ee)

(cherry-picked from 5690402)

(cherry-picked from 1d2b4cb)

(cherry-picked from 688ac16)

(cherry-picked from 3c45b23)

(cherry-picked from 56a48ed)

…se-2_8

#13194)

(cherry picked from commit 71e7aab)

(cherry-picked from cd7592d)

the existing filename in the vector open file dialog

(cherry-picked from 1a91ae8)

(cherry picked from commit 2844005)

…ts (fixes #13289)

(cherry picked from commit 5326c6b)

If custom order is not enabled and a group is requested, layers was added in
 the DOM element order. The default endering order is the reverse.

To fix this issue, QgsWMSProjectParser::addLayersFromGroup has to read group
 element children from end (bottom) to start (top).

The QGIS Server layer cache is used to store layer with default style, but in
 QgsWMSProjectParser::mapLayerFromStyle layers are not cached if the style is
 not empty.

In WMS, default and empty style is the same and the variable EMPTY_STYLE_NAME
 is here for this.

The fix uses EMPTY_STYLE_NAME to use the cache.

cherry-picked from 7065762

(cherry-picked from 4bc606c)

also fix #11676

(cherry-picked from c84b2df)

fix #13262

(cherry-picked from d897624)

Was setting fields only on temporary copies of the features, not
the stored features themselves

(cherry-picked from 910cb01)

QGIS-Server has some trouble to resolve relative pathes. For example,
 SVGMarker path and NETCDF datasource are not resolved in QGIS Server unlike
 in QGIS Desktop.

To resolve relative path for SVGMarker, the class QgsSombolLayerV2Utils is
 used and it based on QgsProject::instance()->fileName().
To resolve relative path for NETCDF datasource and other GDAL datasources, the
 class QgsMapLayer is used and it based on
 QgsProject::instance()->readPath( filename ).

To fix the issue, the QgsProject instance fileName is set in the
 QgsServerProjectParser constructor.

…mpatible

If the user checks 'used layer id as name' and specifies 'restricted layers',
 the restriction is not applied.

To fix it, I add the layer ids to the restricted layers list.

…destination CRS

If the layer_coordinate_transform_info child of mapcanvas has not been well
 saved, the destinationCrs is not well applied and we get a blank image.

To resolve this issue, we just have to add layer coordinate transforms to the
 map renderer before setting the destination CRS.

With https://github.com/3liz/qgis-wfsOutputExtension, I found that QGIS Server
 Headers are not always well formed. An extra line can be added at the end.

In the commit a9c830e from @mhugent, I found
 the fix.

The default units in QgsMapRenderer is Millimeters. The default units in SLD
 is Pixel but exportSld does not convert all millimeters in pixels.

We notes this bug by comparing default QGS Server rendering and rendering with
 the SLD generated by QGIS.

To resolve it, we just have to add units to the document element.

The default units in QgsMapRenderer is Millimeters. The default units in SLD
 is Pixel but exportSld does not convert all millimeters in pixels.

We notes this bug by comparing default QGS Server rendering and rendering with
 the SLD generated by QGIS.

To resolve it, we just have to add units to the document element.

Since QGIS 2.8, QGIS Server rendered layers form group in reverted order.

Conflicts:
	src/server/qgswmsconfigparser.cpp

(cherry picked from commit 08185c9)

Fixes #13781 (crash)

Line breaks are not properly handled in GeoJSON results when making GetFeature requests.
Line breaks should be replaced by \\n.

(cherry picked from commit 6e1df49)

…reaks

Enhance replace, thanks to @nyalldawson
Enhance format, thanks to @jef-n

fixes #13118

Fixes #13811
Includes testcase

(cherr-picked from 824fd7b)

(cherry-picked from dc0639c)

(cherry-picked from 2856981)

(cherry-picked from e2dc8bf)

(cherry-picked from 8f0ed61)

- add docs
- add missing SIP bindings
- remove unnecessary cast from double->float->double
- add unit tests

(cherry-picked from f0a2fc1)

(fix #13355)
(cherry-picked from aa4d65d)

has multiple layers

(cherry-picked from a0d7653)

…ojects

(cherry-picked from 0da9306)

when SVG file does not support parameters

(Cherry-picked from 3aa6c4f)