[mobs] Prevent crash when on_blast returns nil

fix mobs explode instantly, issue #509

Clay gives 4 lumps when dug

fix MinetestForFun/server-minetestforfun-skyblock#196

[Profnsched] lost jobs correction

Modified to replace # when we ant to count items in an array.
Code currently not cleaned after correction.

[mobs] Uncomment half of attack stop

 - ... but only for non-explosive mobs
 - #509 , following the advice of @Crabman77

disable profilerdumper , issue #512

Update [mysql_auth]

Move [stacktraceplus] to mods/

remove old aliases for jumping mod(re-added)

[action_timers] Convert globalstep to minetest.after for #179