Revert dig time in creative mode to 0.5

This made it impossible to punch things without breaking them in creative
Merge remote-tracking branch 'proller/sponge' into next
Merge remote-tracking branch 'proller/weather' into next
Merge remote-tracking branch 'proller/liquid63' into next
Merge remote-tracking branch 'MirceaKitsune/moonflower' into next
Merge remote-tracking branch 'khonkhortisan/diagonal_rail' into next
Merge remote-tracking branch 'Novatux/furnace' into next
Merge remote-tracking branch 'cyisfor/master' into next
submodule add proller/minetest-mod-weather-dynamic/master to mods