sv_noweaponspawn support for SinglePlayer

[Hell-met]

Hi

By forcing DMFLAGS in autoexec.cfg we are able to cause Multiplayer things to appear in Singleplayer. This allows offline folks to enjoy extra monsters and challenges without netplay.

There's also another handy option known as sv_noweaponspawn to cancel out those extra DM weapon spawns while still retaining extra monsters - however this option refuses to apply to SinglePlayer even with the appropriate dmflags and only checks for true coop netplay.

The problem is I'd like to enjoy coop monsters but I don't want double BFGs, SSGs and essentially the entire arsenal straight out of map01, like shown here

Could it be possible to make sv_noweaponspawn support singleplayer aswell as coop?