Update qgis_configuration.rst

added the docs related to commit 9ef4b
Update qgis_configuration.rst

added docs related to commit 09016
Merge pull request #262 from ghtmtt/patch-1

Update qgis_configuration.rst
Merge pull request #263 from ghtmtt/patch-2

Update qgis_configuration.rst
Merge remote-tracking branch 'upstream/master'