Add config entry for `FixDualiesCost`

config/Acedia.ini

@@ -151,6 +151,7 @@ autoEnable=true
 ;     Both situations are highly unlikely, but the option is there.
 allowNegativeDosh=true
 
+
 ;     This feature attempts to prevent server crashes caused by someone
 ; quickly switching between being spectator and an active player.
 [Acedia.FixSpectatorCrash]
@@ -175,4 +176,50 @@ spectatorChangeTimeout=0.25
 ; the current amount of real players + that difference.
 ; So 4 players + 3 (=7 numPlayers) after kicking 1 player becomes
 ; 3 players + 3 (=6 numPlayers).
-allowServerBlock=true
+allowServerBlock=true
+
+
+;     This feature fixes several issues related to the selling price of both
+;   single and dual pistols, all originating from the existence of dual weapons.
+;   Most notable issue is the ability to "print" money by buying and
+;   selling pistols in a certain way.
+;
+;       It fixes all of the issues by manually setting pistols'
+;   'SellValue' variables to proper values.
+;       Fix only works with vanilla pistols, as it's unpredictable what
+;   custom ones can do and they can handle these issues on their own
+;   in a better way.
+[Acedia.FixDualiesCost]
+autoEnable=true
+;     Some issues involve possible decrease in pistols' price and
+; don't lead to exploit, but are still bugs and require fixing.
+;     If you have a Deagle in your inventory and then get another one
+; (by either buying or picking it off the ground) - the price of resulting
+; dual pistols will be set to the price of the last deagle,
+; like the first one wasn't worth anything at all.
+; In particular this means that (prices are off-perk for more clarity):
+;     1. If you buy dual deagles (-1000 do$h) and then sell them at 75% of
+;     the cost (+750 do$h), you lose 250 do$h;
+;     2. If you first buy a deagle (-500 do$h), then buy
+;     the second one (-500 do$h) and then sell them, you'll only get
+;     75% of the cost of 1 deagle (+375 do$h), now losing 625 do$h;
+;     3. So if you already have bought a deagle (-500 do$h),
+;     you can get a more expensive weapon by doing a stupid thing
+;     and first selling your Deagle (+375 do$h),
+;     then buying dual deagles (-1000 do$h).
+;     If you sell them after that, you'll gain 75% of the cost of
+;     dual deagles (+750 do$h), leaving you with losing only 375 do$h.
+; Of course, situations described above are only relevant if you're planning
+; to sell your weapons at some point and most people won't even notice it.
+; But such an oversight still shouldn't exist in a game and we fix it by
+; setting sell value of dualies as a sum of values of each pistol.
+;     Yet, fixing this issue leads to players having more expensive
+; (while fairly priced) weapons than on vanilla, technically making
+; the game easier. And some people might object to having that in
+; a whitelisted bug-fixing feature.
+;     These people are, without a question, complete degenerates.
+;     But making mods for only non-mentally challenged isn't inclusive.
+;     So we add this option.
+;     Set it to 'false' if you only want to fix ammo printing
+; and leave the rest of the bullshit as-is.
+allowSellValueIncrease=true