Add enabledpatches config option

The server administrator must now specify which patches they want the
server to load (if deviating from the defaults). There are multiple
reasons for this:

* It's useful to be able to pick and choose which patches you want to
boot the server with; without having to move the directories in and out
of the patch directory
* This way, we can have different default patches for different builds
of the game (104 vs 1013)
* ...ergo, it's easier to rapidly switch builds without having to
rearrange your workspace to properly run them
* This also allows us to remove the std::filesystem stuff, which has
spotty compatibility with slightly older (but still current) versions of
the compilers

src/settings.cpp

@@ -45,8 +45,10 @@ std::string settings::DROPSJSON = "drops.json";
 std::string settings::PATHJSON = "paths.json";
 #ifdef ACADEMY
 std::string settings::XDTJSON = "xdt1013.json";
+std::string settings::ENABLEDPATCHES = "1013";
 #else
 std::string settings::XDTJSON = "xdt.json";
+std::string settings::ENABLEDPATCHES = "";
 #endif // ACADEMY
 
 int settings::ACCLEVEL = 1;
@@ -96,6 +98,7 @@ void settings::init() {
     DBPATH = reader.Get("shard", "dbpath", DBPATH);
     TDATADIR = reader.Get("shard", "tdatadir", TDATADIR);
     PATCHDIR = reader.Get("shard", "patchdir", PATCHDIR);
+    ENABLEDPATCHES = reader.Get("shard", "enabledpatches", ENABLEDPATCHES);
     ACCLEVEL = reader.GetInteger("shard", "accountlevel", ACCLEVEL);
     EVENTMODE = reader.GetInteger("shard", "eventmode", EVENTMODE);
     DISABLEFIRSTUSEFLAG = reader.GetBoolean("shard", "disablefirstuseflag", DISABLEFIRSTUSEFLAG);