Fix #8434 (join by spatial location locks up QGIS)

By caching the features of the provider in the inner loop, there is
a considerable speedup (compared to doing millions of queries)
[TRANSUP] nb by James

Signed-off-by: Werner Macho <werner.macho@gmail.com>
[TRANSUP] da by Bo

Signed-off-by: Werner Macho <werner.macho@gmail.com>
store original proj4 representation of a CRS and use it to store a custom CRS
geometry: add some null pointer checks (fixes #8433)
[composer] Improve logic for pan shortcuts (fix #8957)
[composer] Ensure correct mouse cursor is set after releasing pan/zoom shortcut keys
Fix crash in dxf export in no-symbology mode
[TRANSUP] da by Bo

Signed-off-by: Werner Macho <werner.macho@gmail.com>
Merge branch 'master' of https://github.com/qgis/QGIS
wfs: catch end of selected features (fixes #8979)
debian packaging update