fix destination nodata value in gdal merge
use collapsible group box for creation options in gdal merge widget
gdal merge tool: make sure -a_nodata is only added with gdal>=1.9
[DXF] add (un)select all buttons
[DXF] do not list layer without geometry
Add license header for dxfexportdialog
Dxf: possibility to export only the features overlapping the map extent
Dxf export: modify layer name to be a valid dxf layer name
WMS/OWS:
- add service type to window title (implements #9192)
- always fill dpi combobox (fixes #9194)
Tweak random color ramp for nicer colors
a unit to network cache size label (fixes #9189)
fix warning
WMS: try to interpret response to map requests always as image (fixes #9197)
debian packaging update
translation update: no with new translator added

Signed-off-by: Werner Macho <werner.macho@gmail.com>
convert GDAL no data value to a value representable by data type, fixes #3840
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/ahuarte47/QGIS