modernize

[The4codeblocks]

minetest → core
use vector functions wherever possible (to allow other mods to wrap them)
facilitate function wrapping in some other places

[wsor4035]

fat pr - conditional on the tests being fixed

[S-S-X]

See S-S-X/mineunit#119

[wsor4035]

(still isnt passing).

additionally given the engine is on 5.14 now, dont exactly care about 5.0, especially since it limits you to formspec v1 (which has terrible cords), and before 5.4 use texture alpha is a bool instead of a mode, etc. i would wager a guess that if you looked through the code you would find something that already breaks the works on 5.0 expectation

[The4codeblocks]

now it's passing

Works now to the spec though I do agree we probably should increase min required version at cdb (and also add it to conf file). And then of course also increment mineunit engine version for later core libs.

My formal approval is just waiting for better actual review, it seems all good to me just did not have time (and good enough hardware to go through actual changes if there was any).